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Answer:

2500 N

Explanation:

Tension force may be defined as the force which is transmitted along a cable, rope, or through a string which is stretchable and is puled tight by the forces acting from the opposite sides. It is directed along the length of the string or the rope.

In the context, a pulley string holds a 2500 N piano that is used to lift it to second story balcony. When the piano is held stationary by the mover, the tension force acting on the rope is the weight force or the gravitational force that acts on the piano which is 2500 N. The tension force balances the the weight force of the piano when it is not moving.

Answer:

12.5

Explanation:

Answer:

A _______________ is a diagram that shows the relationship of one variable to another.

Explanation:

Answer:

second law is f=ma (force=massxacceleration)

Explanation:

Answer:

A object, lets say a cup. This cup will never, ever move unless something or someone disturbs it. If something touches or hits this cup the cup will move. But, until the cup gets touched, nothing will EVER make it move.

Explanation:

I hope this helps!!

Answer:

4 meters a second

Explanation:

100/25

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Answer:

C

Explanation:

Sedimentary rocks are the product of

1) weathering of preexisting rocks,

2) transport of the weathering products,

3) deposition of the material

4) compaction (two rocks pushed together)

5) cementation of the sediment to form a rock.

Answer:

V = 7.5 m/s

Explanation:

Given that,

Mass of player 1, m₁ = 50 kg

Mass of player 2, m₂ = 150 kg

50 kg player stands still and 150 kg player is traveling at 10 m/s

We need to find the velocity of the player immediately after the collision. As the inelastic collision occurs. The linear momentum will remain conserved. After the collision, let they move with a constant velocity say V.So,

[tex]m_1u_1+m_2u_2=(m_1+m_2)V\\\\V=\dfrac{m_1u_1+m_2u_2}{(m_1+m_2)}\\\\=\dfrac{150\times 10}{(50+150)}\\\\=7.5\ m/s[/tex]

So, the velocity of the player immediately after the collision is 7.5 m/s.

Answer:

I think that's Newton's second law of motion

Explanation:

f = m(v-u)

________

t

since a = (v-u)t

f = ma

Solution :

Speed of the air craft, [tex]$S_a$[/tex] = 262 m/s

Fuel burns at the rate of, [tex]$S_b$[/tex] = 3.92 kg/s

Rate at which the engine takes in air, [tex]$S_{air}$[/tex] = 85.9 kg/s

Speed of the exhaust gas that are ejected relative to the aircraft, [tex]$S_{exh}$[/tex] =921 m/s

Therefore, the upward thrust of the jet engine is given by

[tex]$F=S_{air}(S_{exh}-S_a)+(S_b \times S_{exh})$[/tex]

F = 85.9(921 - 262) + (3.92 x 921)

   = 4862635.79 + 3610.32

   = [tex]$4.8 \times 10^6 \ N$[/tex]

Therefore thrust of the jet engine is [tex]$4.8 \times 10^6 \ N$[/tex].

Answer:

Both of them

Explanation:

Answer:

The moon also falls towards the Earth, but having a tangential speed, the acceleration it has is used in the change of direction of its speed,

Explanation:

Newton explained that all objects attract each other, as the Earth is much greater than the apple, it is this that falls towards the Earth.

The moon also falls towards the Earth, but having a tangential speed, the acceleration it has is used in the change of direction of its speed, in general this acceleration is called centripetal

     [tex]a_{c} = g[/tex]

This principle is used in all circular motion devices, for example the merry-go-round in parks, the radius of the circle is proportional to the speed of the turn and therefore to the centripetal acceleration of the device.

Answer:

Explanation:

The time taken can be found by using the formula

[tex]t = \frac{d}{v} \\ [/tex]

d is the distance

v is the velocity

From the question we have

[tex]t = \frac{350}{50} = \frac{35}{5} = 7 \\ [/tex]

We have the final answer as

Hope this helps you

Explanation:

C. Atomic numbers....

Answer:

atomic numbers

Explanation:

In order for two atoms to be different, they have to have a different number of protons. Protons are represented by the atomic number. Thus, atoms of two DIFFERENT elements must have different atomic numbers.

I took the test and got 100%

Hope this helps!

Answer:Volume

Explanation:

Density = mass/ Volume

Answer:

Volume

Explanation:

Answer:

Rachels car moves and ashleys stops

Explanation:

When Ashley's moving car collides with Rachel's bumper car which is at rest then some of the momentum of Ashley's car is transferred to Rachel's car causing it to move.

Conservation of momentum states that the momentum of a system is constant if there is the absence of external forces on the system. The momentum of an object can be conserved and is a vector quantity.

Momentum can be defined as the multiplication of the mass of a particle and its velocity. The law of conservation of momentum is confirmed by experiment and can be deduced mathematically on the presumption that space is uniform.

Conservation of linear momentum is derived from Newton’s second law of motion states that the total momentum remains the same in an isolated system.

The total momentum of  Ashley's car and Rachel's car remains conserved. After the collision, the momentum transferred from  Ashley's car and Rachel's car which makes it move.

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Answer:

1/2 m*(2(h)/t)*g

Explanation:

Kinetic energy refers to the form of energy that's used by an object due to its motion.

You didn't give more information about the values, therefore, the kinetic energy will be explained. It should be noted that when work, which helps in the transfer of energy is done on an object, the object will speed up and thereby gain kinetic energy.

Kinetic energy simply refers to the property of a moving object or a particle. It depends on both motion and mass. The formula for the calculation of kinetic energy is given as:= 1/2mv²

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Answer:

The thrust is  [tex]F = 7828.3 \  N [/tex]

Explanation:

From the question we are told that

   The speed of the jet aircraft is  [tex]v = 214 \ m/s[/tex]

    The rate at which the engine takes in air is [tex]\^ Q = 115 \ kg/s[/tex]

    The rate  at which the engine burns fuel is  [tex]\r m = 2.53 \ kg/s[/tex]

    The speed of the exhaust gases is  [tex]u = 276 \ m/s[/tex]

Generally the thrust of the engine is mathematically represented as

      [tex]F =[ \^ Q * ( u - v )] + (\r m * u)[/tex]

=>   [tex]F =[ 115 * ( 276  -  214 )]  + (2.53 * 276)[/tex]

=>   [tex]F = 7828.3 \  N [/tex]

Answer:

1700 kg

Explanation:

The mass of the ford mustang car be 1700 kg.

In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter. It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force.

The change caused by an applied force is smaller the more mass a body has. The kilograms serves as the unit of mass in the International System of Units (SI).

Given parameters:

Force applied on the ford mustang car: F = 5100 N.

Acceleration of the ford mustang car: a = 3 m/s^2.

So, The mass of the ford mustang car be = force/acceleration

= 5100/3 kg.

= 1700 kg.

Hence, the mass of the ford mustang car be  1700 kg.

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Answer:

Hence appliance but be connected to a 3.67 ohms load to maintain a safe amount of the current

Explanation:

According to Ohm's law, V = IR

V is the potential difference = 220volts

I is the current = 60 A

R is the resistance (Load)

Calculating the load R

R = V/I

R = 220/60

R = 3.67 ohms

Hence appliance but be connected to a 3.67 ohms load to maintain a safe amount of the current

Answer:

b

Explanation:

b is the correct answer

Answer:

b. Her velocity is positive, and her acceleration is negative.

Explanation:

Answer:

115°c

Explanation:

°c=k-273

388-273=115

Answer:

345.60N

Explanation:

The magnitude of the force parallel to the ramp that will push the box up the ramp are the frictional force(Ff) and the moving force Fm

Total force = Ff + Fm

Ff = ηR

Ff = ηmgcosθ

Fm = Wsinθ

Fm = mgsinθ

Total force = ηmgcosθ + mgsinθ

Total force = mg(ηcosθ + sinθ)

Given

mass m = 71kg

acceleration due to gravity g = 9.8m/s²

angle of inclination θ = 16°

coefficient of friction η = 0.23

Substitute into the formula;

Total force = 71(9.8)(0.23cos16 + sin16)

Total force = 695.8(0.2211+0.2756)

Total force = 695.8(0.4967)

Total force = 345.60N

Hence the magnitude force parallel to the ramp that you should push on the box so that it moves up the ramp at a constant speed is 345.60N

Answer:

As frequency increases, wavelength decreases. Frequency and wavelength are inversely proportional. This basically means that when the wavelength is increased, the frequency decreases and vice versa.

Explanation:

A wave's velocity is independent of its intensity and equal to the product of its wavelength and frequency (number of vibrations per second) so, velocity remains constant if you increase the frequency.

Frequency is defined as the no of waves that are passing from the point in respect to a given time. Frequency can be measured in Hertz. Humans, whose capacity to hear is normal, can hear between the frequency of 20 Hertz to 20000 Hertz.

In mathematical form, the frequency is the factor of one divided by the time period. The number of cycles or vibrations a body in periodic motion makes in one unit of time.

Wavelength reduces as frequency rises. The relationship between frequency and wavelength is inverse. In essence, this means that the frequency reduces as the wavelength increases and vice versa.

Frequency ∝ 1 / Wavelength

Velocity = Frequency  ×  Wavelength

Thus, it remains constant.

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