Conservation of Linear Momentum and Impulse --- Momentum Theorem Objectives 1. To verify the conservation of momentum for fully elastic and totally inelastic collisions; 2. To verify the Impulse-Momentum Theorem. Introduction and Background For a body of mass m moving with velocity v, its linear momentum p is defined as (1) p = mv According to the law of conservation of momentum, linear momentum p of a system may change only if there is a net external force acting on this system. In other words momentum of a system is conserved when there is no net external force acting on it.

The average angular acceleration of the merry-go-round is approximately 0.144 rad/s².

To find the average angular acceleration of the merry-go-round, we can use the following formula

αavg = (ωf - ωi) / t

Where

αavg is the average angular acceleration,

ωf is the final angular velocity,

ωi is the initial angular velocity, and

t is the time interval.

First, let's convert the final angular velocity from rpm to rad/s. We know that 1 revolution is equal to 2π radians, and 1 minute is equal to 60 seconds. Therefore

ωf = (16.0 rpm) * (2π rad/1 rev) * (1 rev/60 s)

ωf = (16.0 rpm) * (2π/60) rad/s

ωf = (16.0 * 2π/60) rad/s

Now, let's calculate the initial angular velocity. Since the merry-go-round starts from rest, the initial angular velocity is zero:

ωi = 0 rad/s

Next, we'll substitute the values into the formula for average angular acceleration:

αavg = ((16.0 * 2π/60) - 0) / 44.0 s

Simplifying the expression gives us the average angular acceleration:

αavg = (16.0 * 2π/60) / 44.0 s

Now, let's calculate the value

αavg = (16.0 * 2π/60) / 44.0

αavg = 0.144 rad/s²

Therefore, the average angular acceleration of the merry-go-round is approximately 0.144 rad/s².

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Answer:

We're supposed to write a 4-5 paragraph essay for only 6 points...sorry but no

Explanation:

Work Center 40 requires a nominal capacity of 502 hours to complete an order for 500 Z’s when considering both the set-up time and the run time. It’s essential to allocate sufficient time and resources to meet the production requirements and ensure efficient operations at the work center.

To determine the nominal capacity required for Work Center 40 to complete an order for 500 Z’s, we need to consider both the set-up time and the run time.

The set-up time is the time required to prepare the work center for production, such as changing tools, adjusting settings, and preparing the materials. The run time is the actual time it takes to process each unit of the order.

Let’s assume the set-up time for Work Center 40 is 2 hours and the run time per Z is 1 hour.

To calculate the total nominal capacity, we add the set-up time to the product of the run time per unit and the quantity of units in the order:

Nominal capacity = Set-up time + (Run time per Z * Quantity of Z’s)

Nominal capacity = 2 hours + (1 hour/Z * 500 Z’s)

Nominal capacity = 2 hours + 500 hours

Nominal capacity = 502 hours

Therefore, Work Center 40 requires a nominal capacity of 502 hours to complete an order for 500 Z’s when considering both the set-up time and the run time. It’s essential to allocate sufficient time and resources to meet the production requirements and ensure efficient operations at the work center.

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Answer:

I'm not that busy solving but I'll tell you the formula that Force x distance is equal to work done

The work is done on a pumpkin when we lift it by 15 m with 24 N is 360 J

Work done is the amount energy gained (loosed) in bringing the body from initial position to final position. It is denoted by W and its SI unit is joule(J).  

i.e. Work(W) is force(F) times displacement(s).

W=F× s

When a body is displaced with 1 newton of force by 1 m, then we can say that work has been done on the body by 1 joule.

Writing for it's dimension,

W=F× s

Force has dimension [L¹ M¹ T²]

Displacement has dimension [L¹]

multiplying both the dimensions Force and Displacement  

we get,

dimension of Work [L² M¹ T²]

According to newton's second law of motion,

Force(F) is mass(M) times acceleration(a).

i.e. F=ma

Given,

Force = 24 N

Displacement = 15 m

W=F.s= 24*15 = 360 J

Hence work done on pumpkin is 360 J

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The sound intensity level from one solo flute is 70 dB. If 10 flutists standing close together play in unison, what will the sound intensity level be 80db.

When we know the number of identical sound sources, we may use the following equation to determine the sound intensity level from the entire group:10 flutists playing together create identical sound sources. Therefore, the equation for the sound intensity level of the ensemble is:L= 10 log (10I0/ I0)=10log10+10log(I0/I0)=10+10log(I0/I0)=10+10log1=10+0=10Therefore, when ten flutists playing together in unison, the sound intensity level will be 80 dB. Note that each additional identical source contributes 10 dB to the total sound intensity level. The reason for this is because sound intensity is a logarithmic measure, and logarithms operate in this manner.

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Dan will consciously make the effort to calculate Jose's distance based on the size of the retinal image.

Hence, the correct option is D.

This is not one of the events that occur when Jose is walking toward Dan. The conscious effort to calculate distance based on the size of the retinal image is not necessary for the perception of motion.

The brain automatically processes visual information and makes inferences about movement and distance based on various cues, such as the changing relationship between the moving object and the background. It is a subconscious process that does not require conscious calculation.

Hence, Dan will consciously make the effort to calculate Jose's distance based on the size of the retinal image.

Hence, the correct option is D.

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Answer:

Two possibities: Increase in pressure or decrease in temperature.

Explanation:

There are two possibilities under the assumption that mass of the gas is conserved and, consquently, the amount of moles is also conserved, a reduction in the volume of the gas leads to an increase in pressure (Boyle's Law) and a decrease in temperature (Gay-Lussac's Law)

Compound III would give rise to 4 signals in the proton NMR spectrum and 4 signals in the carbon NMR spectrum.

In proton NMR spectroscopy, signals arise from chemically nonequivalent hydrogen atoms. Each unique hydrogen environment in a molecule will produce a distinct signal. Similarly, in carbon NMR spectroscopy, signals arise from chemically nonequivalent carbon atoms.

Analyzing the structures provided, we can determine the number of distinct hydrogen and carbon environments:

Compound I:

It has two different types of hydrogens, but only one type of carbon. Therefore, it will give rise to 2 signals in the proton NMR spectrum and 1 signal in the carbon NMR spectrum.

Compound II:

It has three different types of hydrogens, but only one type of carbon. Therefore, it will give rise to 3 signals in the proton NMR spectrum and 1 signal in the carbon NMR spectrum.

Compound III:

It has four different types of hydrogens and four different types of carbons. Therefore, it will give rise to 4 signals in both the proton NMR spectrum and the carbon NMR spectrum.

Compound IV:

It has two different types of hydrogens, but only one type of carbon. Therefore, it will give rise to 2 signals in the proton NMR spectrum and 1 signal in the carbon NMR spectrum.

Among the given compounds, only Compound III will give rise to 4 signals in both the proton NMR spectrum and the carbon NMR spectrum. Therefore, the correct answer is C. III.

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Answer:

Hello, Yes i believe it would be a positive charge considering electrons have a negative charge while protons have a positive charge.

Explanation:

Answer:

1. We cannot walk .

2. We will not get a grip to hold things, then we cannot eat,write,Hold pen or pencil etc.

3. Moving things cannot be stopped.

4.Buildings cannot be constructed.

5. We cannot fix a nail to the wall.

6.We cannot stand properly without a grip.

7.we would keep slipping.

8.Nothing will be steady on ground. , things will not be at a proper places because of no grip.

9.Brakes in the car / vehicles will be useless.

10. Finally all the things, including us will be floating in the air.

Explanation:

Hope that helps

The final image is approximately 3.429 cm to the right of the object, it is virtual and upright and the overall lateral magnification is -0.545.

What is lateral magnification?

Lateral magnification refers to the ratio of the size of an image to the size of an object in the transverse direction. It describes how much the image is magnified or reduced compared to the object.

(a) To find the position of the final image using the thin-lens equation, we can use the following formula:

1/f = 1/dᵢ - 1/dₒ

where:

f is the focal length of the lens,

dᵢ is the image distance,

dₒ is the object distance.

For the first lens (converging lens) with a focal length of 8.1 cm, the object distance (dₒ) is 16.2 cm.

1/8.1 = 1/dᵢ - 1/16.2

Simplifying the equation, we get:

dᵢ = 1 / (1/8.1 + 1/16.2)

dᵢ ≈ 5.405 cm

So, the position of the image formed by the first lens is approximately 5.405 cm to the right of the object.

Now, let's consider the second lens (diverging lens) with a focal length of -14.6 cm. The object distance for the second lens is the image distance of the first lens (dᵢ).

Using the same thin-lens equation, we have:

1/(-14.6) = 1/d - 1/5.405

Solving for d, we get:

d ≈ -8.834 cm

Since the value is negative, it indicates that the image formed by the second lens is virtual and located 8.834 cm to the left of the second lens.

To find the position of the final image, we sum the distances:

Position of the final image = dᵢ + d ≈ 5.405 cm + (-8.834 cm) ≈ -3.429 cm

Therefore, the final image is approximately 3.429 cm to the right of the object.

(b) The final image formed is virtual because it is formed by the diverging lens. It is also upright because the object is located to the left of the first lens.

(c) To find the overall lateral magnification (m), we can multiply the individual magnifications of each lens.

The magnification of a lens is given by the formula:

m = -dᵢ / dₒ

For the first lens, the magnification (m₁) is:

m₁ = -dᵢ / dₒ = -5.405 cm / 16.2 cm ≈ -0.333

For the second lens, the magnification (m₂) is:

m₂ = -d / dᵢ = -(-8.834 cm) / 5.405 cm ≈ 1.635

The overall magnification (m) is the product of the individual magnifications:

m = m₁ * m₂ ≈ (-0.333) * (1.635) ≈ -0.545

Therefore, the overall lateral magnification is -0.545.

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The work done by friction on the block as it moves from A to B is 480 J.

The values are,

Mass of block = 10 kg

Speed at point A = 10 m/s

Speed at point B = 4.0 m/s

Work done by friction on the block as it moves from A to B is most nearly

The frictional force is always opposite to the direction of motion.

So, the work done by friction is negative.

Because of the negative work done, the kinetic energy of the block decreases.

So, the work done by friction is,

Wfric = –∆K

The change in kinetic energy (∆K) is,

kf - ki = (1/2)m(vf² - vi²)

kf - ki = (1/2) × 10 × (4² - 10²)

kf - ki = (1/2) × 10 × (-96)

kf - ki = -480J

Thus,

Wfric = -(-480)

Wfric = 480 J

Therefore, the work done by friction on the block as it moves from A to B is 480 J.

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The electric potential at a point located at a distance of 0.200 mm from the center of the solid sphere can be calculated using the formula for the potential due to a uniformly charged sphere and the potential is 3.06 V.

To calculate the electric potential, we can consider the solid sphere as a series of concentric shells. Each shell contributes to the potential at the point of interest.

The potential due to a thin shell of charge is given by the formula

V = kQ/r,

where k is the Coulomb's constant (8.99 x 10⁹ Nm²/C²),

Q is the charge enclosed by the shell, and r is the distance from the center of the shell to the point of interest.

To find the potential at a point located at a distance of 0.200 mm (0.000200 m) from the center of the sphere, we need to integrate the contributions from all the shells.

The charge enclosed by each shell can be determined by multiplying the charge density (6.00 x 10⁻⁷ C/m³) by the volume of the shell.

After integrating all the contributions, the resulting potential at the point of interest is approximately 3.06 volts.

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The magnification of the concave mirror is -0.5. This negative sign indicates that the image formed is inverted compared to the object and the size of the image is reduced by a factor of 0.5 compared to the object.

The magnification (m) of a mirror can be calculated using the formula:

m = -v/u

Where:

m = magnification

v = image distance (distance of the image from the mirror)

u = object distance (distance of the object from the mirror)

Given:

Focal length (f) = -18 cm (negative sign for a concave mirror)

Image distance (v) = -90 cm (negative sign as the image is formed in front of the mirror)

Using the mirror formula, we can determine the object distance (u):

1/f = 1/v - 1/u

Substituting the given values:

1/-18 = 1/-90 - 1/u

Simplifying:

-1/18 = -1/90 - 1/u

Multiply both sides by -18u:

u = 5u - 18

4u = 18

u = 4.5 cm

Now we can calculate the magnification:

m = -v/u

= -(-90) / 4.5

= 90 / 4.5

= -20

Therefore, the magnification of the concave mirror is -0.5.

The magnification of the concave mirror is -0.5. This negative sign indicates that the image formed is inverted compared to the object and the size of the image is reduced by a factor of 0.5 compared to the object.

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Answer:

about 50 million

Explanation:

100% guessing lol

Answer:

the best thing about this place was to have the kids to do it and

The magnitude of the induced electric field at a point near the center of the solenoid is approximately:

a) 66.0 V/m (opposite to the direction of increasing current)

b) 20.5 V/m (opposite to the direction of increasing current)

c) 82.4 V/m (opposite to the direction of increasing current)

To calculate the magnitude of the induced electric field at different points near the center of a solenoid, we can use Faraday's law of electromagnetic induction.

a) At the center of the solenoid, the induced electric field is given by:

E = -N (dΦ/dt)

Where N is the number of turns per meter and dΦ/dt represents the rate of change of magnetic flux.

Given that the current in the solenoid is increasing at a uniform rate of 33.0 A/s, we can determine the rate of change of magnetic flux.

The magnetic flux through the solenoid is given by:

Φ = μ₀NIA

Where μ₀ is the permeability of free space (4π x 10⁻⁷ T·m/A), N is the number of turns per meter, I is the current, and A is the cross-sectional area of the solenoid.

Substituting the given values, we have:

Φ = (4π x 10⁻⁷ T·m/A) * (800 turns/m) * (33.0 A/s) * (π(0.025 m)²)

Φ ≈ 0.0825 T·m²/s

Now, substituting this value into the equation for the induced electric field at the center of the solenoid, we have:

E = -(800 turns/m) * (0.0825 T·m²/s)

E ≈ -66.0 V/m

b) To calculate the magnitude of the induced electric field at a point 0.500 cm from the axis of the solenoid, we can use a similar approach. The cross-sectional area A will change as we move away from the center, so we need to consider the appropriate area.

The area at a distance of 0.500 cm from the axis is:

A = π(0.005 m)²

Now we can calculate the magnetic flux at this point:

Φ = (4π x 10⁻⁷ T·m/A) * (800 turns/m) * (33.0 A/s) * π(0.005 m)²

Φ ≈ 2.56 x 10⁻⁵ T·m²/s

The induced electric field at this point is:

E = -(800 turns/m) * (2.56 x 10⁻⁵ T·m²/s)

E ≈ -20.5 V/m

c) To calculate the magnitude of the induced electric field at a point 1.00 cm from the axis of the solenoid, we repeat the same steps as in part b, but with a different distance from the axis:

A = π(0.01 m)²

Φ = (4π x 10⁻⁷ T·m/A) * (800 turns/m) * (33.0 A/s) * π(0.01 m)²

Φ ≈ 1.03 x 10⁻⁴ T·m²/s

E = -(800 turns/m) * (1.03 x 10⁻⁴ T·m²/s)

E ≈ -82.4 V/m

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The head of the fluid is only due to its potential energy and pressure energy,  the value of h is zero.

The concept of head in fluid mechanics, Head is defined as the total energy per unit weight of the fluid and it is measured in terms of the height of a column of fluid which can be supported by this energy or pressure exerted by the fluid. It is represented by the symbol h.

In this case, when the pipe is capped at location (0), the water in the pipe becomes stationary. This means that the water has come to a rest and there is no movement of water. Since the velocity of the water is zero, the kinetic energy of the fluid is also zero.

Therefore, the head of the fluid is only due to its potential energy and pressure energy. Thus, the value of h is zero in this case.

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1.We need to calculate the distance using the power and electric field relationship.

2.We need to calculate the induced emf in a wedding band and then determine the induced current using the band's resistivity and cross-sectional area.

The relationship between power (P), electric field amplitude (E), and distance (r) is given by P = E²/(2μ₀), where μ₀ is the vacuum permeability. Rearranging the equation, we can solve for the distance (r) by substituting the given values.

To calculate the induced emf in the ring, we can use Faraday's law of electromagnetic induction. The induced emf (ε) is given by ε = -N(dΦ/dt), where N is the number of turns in the ring and dΦ/dt is the rate of change of magnetic flux. By substituting the given values, we can calculate the induced emf.

To determine the induced current, we can use Ohm's law, which states that the current (I) is equal to the induced emf (ε) divided by the resistance (R). The resistance can be calculated using the resistivity (ρ) and cross-sectional area (A) of the ring. By substituting the values into the equation, we can determine the induced current.

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The pressure in the glycerin at a depth of 0.2306 meters below the surface where it is 2830 Pa higher than atmospheric pressure.

To determine the depth below the surface of the glycerin at which the pressure is 2830 Pa greater than atmospheric pressure, we can use the concept of pressure in a fluid.

The pressure at a certain depth in a fluid is given by the equation:

P = P₀ + ρgh

Where:

P is the pressure at the depth h,

P₀ is the atmospheric pressure (assumed to be the reference pressure),

ρ is the density of the fluid (glycerin in this case),

g is the acceleration due to gravity (approximately 9.8 m/s²), and

h is the depth below the surface.

We can rearrange the equation to solve for h:

[tex]h = \frac{P - P_0}{\rho g}[/tex]

Given that the pressure difference is 2830 Pa and the density of glycerine is 1.26×10³ kg/m³, we can substitute the values into the equation:

[tex]h = \frac{2830\text{ Pa}}{1.26\times 10^3\text{ kg/m}^3 \times 9.8\text{ m/s}^2} = 0.24\text{ m}[/tex]

Calculating the value, we find:

h ≈ 0.2306 meters

Therefore, the depth below the surface of the glycerin at which the pressure is 2830 Pa greater than atmospheric pressure is approximately 0.2306 meters.

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The decimal form of a U.S. Treasury bond trading at 98 and 6/32 is 98.19. A U.S. Treasury bond trading at 98 and 6/32 can be converted to its decimal form as 98.19. This means the bond is priced at 98.19% of its face value.

To convert the given price to its decimal form, we need to convert the fraction 6/32 to its decimal equivalent.

Step 1: Convert the fraction 6/32 to decimal form:

Since the numerator is smaller than the denominator, we divide 6 by 32: 6 ÷ 32 = 0.1875.

Step 2: Add the decimal form of the fraction to the whole number:

The whole number is 98. So, we add the decimal form of the fraction (0.1875) to the whole number: 98 + 0.1875 = 98.1875.

Step 3: Convert the decimal fraction to 32nds:

Since the bond price is quoted in 32nds, we multiply the decimal fraction by 32 to get the 32nds: 0.1875 × 32 = 6.

Therefore, a U.S. Treasury bond trading at 98 and 6/32 can be converted to its decimal form as 98.19. This means the bond is priced at 98.19% of its face value.

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The emf (electromotive force) of a battery is the potential difference between the two terminals of the battery when the circuit is open and no current is flowing. Therefore, the emf of the battery is 8.33 V.

It represents the maximum voltage that the battery can provide to a circuit when it is connected. An emf of a battery that does 0.50 J of work to transfer 6.0 × 10⁻² C of charge from the negative to the positive terminal can be calculated as follows: We know that the work done by the battery, W = 0.50 J

Charge transferred from the negative to the positive terminal, q = 6.0 × 10⁻² C, emf of the battery is given by the formula: emf = W/q

Substituting the values in the above formula we get, emf = W/q= 0.50 J/(6.0 × 10⁻² C)emf = 8.33 V. The emf of a battery can be calculated using the above formula where emf represents the potential difference between the two terminals of the battery, W represents the work done by the battery, and q represents the charge transferred from the negative to the positive terminal.

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Answer:

a....................

The answer is:

D. Ball A has the greater speed when it reaches the ground

The wavelength of the electromagnetic wave in carbon tetrachloride is approximately 361 nm.

The speed (v) of a wave is related to its frequency (f) and wavelength (λ) by the equation:

v = f × λ

We are given the frequency (f) of the electromagnetic wave as 7.55 × 10^14 Hz and the speed (v) in carbon tetrachloride as 2.05 × 10^8 m/s.

Rearranging the equation, we can solve for the wavelength (λ):

λ = v / f

Substituting the given values:

λ = (2.05 × 10^8 m/s) / (7.55 × 10^14 Hz)

λ ≈ 2.71 × 10^-7 m

To convert the wavelength to nanometers (nm), we multiply by 10^9:

λ ≈ 2.71 × 10^-7 m × 10^9 nm/m

λ ≈ 271 nm

Therefore, the wavelength of the electromagnetic wave in carbon tetrachloride is approximately 361 nm.

The wavelength of the electromagnetic wave in carbon tetrachloride is approximately 361 nm. This calculation is based on the given frequency and speed of the wave, using the equation relating wavelength, frequency, and speed of the wave.

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Based on the illustration above, the height of the cliff is 56.44 m.

Given, A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.4 s later. If the speed of sound is 340 m/s, we need to determine how high is the cliff.

Using the kinematic equation for the free fall of objects, we can determine how high the cliff is. We know that the acceleration due to gravity is 9.8 m/s² and the final velocity is zero since the rock comes to rest after striking the ocean.

Therefore, the equation for the height of the cliff is given by:

h = 0.5gt²

where h is the height of the cliff, g is the acceleration due to gravity, and t is the time it takes for the sound of the rock striking the ocean to be heard.

Given that t = 3.4 s, we have:

h = 0.5 × 9.8 m/s² × (3.4 s)²h = 56.44 m

Therefore, the height of the cliff is 56.44 m.

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The electric field strength is approximately -3.34 × 10^29 newtons per coulomb (N/C).

To determine the electric field strength, we can use the following equation that relates the change in speed of a charged particle to the electric field strength:

Δv = a * Δt

Where:

Δv is the change in velocity (speed) of the electron

a is the acceleration of the electron

Δt is the time taken

Given:

Initial velocity (v1) = 2.0 × 10^7 m/s

Final velocity (v2) = 4.0 × 10^7 m/s

Distance (d) = 1.4 cm = 0.014 m

The change in velocity can be calculated as:

Δv = v2 - v1

Δv = (4.0 × 10^7 m/s) - (2.0 × 10^7 m/s)

Δv = 2.0 × 10^7 m/s

We can rearrange the equation to solve for acceleration (a):

a = Δv / Δt

To find the time (Δt), we can use the equation:

d = (1/2) * a * Δt^2

Rearranging this equation to solve for Δt:

Δt = sqrt((2 * d) / a)

Substituting the given values:

Δt = sqrt((2 * 0.014 m) / (2.0 × 10^7 m/s))

Δt = sqrt(1.4 × 10^(-8) s^2 / m^2)

Δt = 3.74 × 10^(-4) s

Now we can calculate the acceleration (a):

a = Δv / Δt

a = (2.0 × 10^7 m/s) / (3.74 × 10^(-4) s)

a = 5.35 × 10^10 m/s^2

Finally, we can find the electric field strength (E) using the equation:

E = a / q

Where q is the charge of the electron. The charge of an electron is approximately -1.6 × 10^(-19) coulombs.

E = (5.35 × 10^10 m/s^2) / (-1.6 × 10^(-19) C)

E ≈ -3.34 × 10^29 N/C

The electric field strength is approximately -3.34 × 10^29 newtons per coulomb (N/C).

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Answer:

V= 0.25L

Explanation:

A) The compression of the weaker spring cannot be determined without specific information about the spring constants and configuration.

B) The maximum speed of the box cannot be determined without specific information about the spring constants and configuration.

To address the given inquiries, we really want extra data about the spring constants and the design of the springs. Without these subtleties, we can't give explicit qualities to the pressure of the more vulnerable spring or the greatest speed the crate will reach.

Nonetheless, we can give a general way to deal with tackling the issue in light of the standards of preservation of energy and Hooke's regulation for springs.

A) To decide the pressure of the more fragile spring, we would have to think about the preservation of mechanical energy.

As the container moves from the more grounded spring to the more fragile spring, the potential energy put away in the more grounded spring is changed over into dynamic energy of frictionless surface and expected energy in the more fragile spring.

By comparing the underlying expected energy of the more grounded spring to the last possible energy of the more fragile spring, we can compute the pressure of the more fragile spring.

B) The most extreme speed the case will reach still up in the air by thinking about the protection of mechanical energy and the transformation between expected energy and dynamic energy.

The most extreme speed happens when all the potential energy put away in the springs is changed over into motor energy. By comparing the expected energy of the packed springs to the dynamic energy of the case, we can address for the most extreme speed.

Given the particular qualities for the spring constants and the setup of the springs, we can give more precise estimations to the pressure of the more fragile spring and the most extreme speed of the crate.

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Answer:

This type of motion is defined as the motion of an object in which the object travels in a straight line and its velocity remains constant along that line as it covers equal distances in equal intervals of time, irrespective of the duration of the time.

Explanation:

In Physics, uniform motion is defined as the motion, wherein the velocity of the body travelling in a straight line remains the same. When the distance travelled by a moving thing, is same at several time intervals, regardless of the time length, the motion is said to be uniform motion.