A car of mass 1500 kg is moving with a velocity of 72 km/h. When the driver applied brakes, the velocity of the car reached 10 km/h by travelling the distance of 50 m. Calculate the amount of force applied in the car during that time.

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From the calculations and the data provided, the speed is obtained as 15 m/s

The term momentum refers to the product of mass and velocity. Given that we can now proceed with the answer.

Since;

p = mv

m = 750kg

v = 5 km/hr or 1.4 m/s

p = 750kg *  1.4 m/s

p = 1050 kgm/s

If the mass of the body is 70kg, the speed is

v = p/m

v = 1050 kgm/s/70 Kg

= 15 m/s

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Ten minutes after you stop exercising, your heart rate should be equal to your heart rate reserve

This is defined as the heart rate the body decreases to after an exercise session has been done.

This however varies according to age of individuals and is calculated by finding the difference between the maximum and resting heart rate.]

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Answer:

B. A system cannot take in additional matter.

Explanation: The total amount of energy in the universe remains constant, it can merely change from one form to another.

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The answer for the missing labeling as (i) and (ii) will be (i)thermometer and (ii)condenser.

A burner is a device intended to guarantee that the flame is stabilized.

By creating a proper flow field to cause the initial temperature rise, a  The fuel/air combination is heated from within the flame to the ignition temperature.

When the flame or heat is created in fuel-burning or heat-generating equipment.

Wood, coal, kerosene, LPG, petrol, and diesel are a few of the often utilized fuels. In order to cook, heat, power vehicles, and create electricity, we utilize fuels.

The barrel, collar, air holes, gas intake, gas valve, and base are the different pieces of a Bunsen burner. Each component is essential to the process of creating a flame.

Hence, the answers for the missing labeling will be  (i) thermometer and (ii) condenser.

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The quarks that compose a baryon may have charges of +(2/3)e and -(1/3)e which means have negative and positive charges.

Quarks are the most fundamental particles that make up the atomic nucleus. All solid matter that we know is made of three particles, which are the up and down quarks, 'u' and 'd', and the electron.

Quark is one of the two basic elements that make up matter and is the only one of the particles that interacts through all four fundamental forces.

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The separation between the lines of the grating is 13.33μm.

The diffraction grating is the continuous lines with very minute slits or grating space in mm.  It divides light composed of various wavelengths into light components by particular wavelength.

dsinθ = nλ

Substitute n =3, λ =490 x 10⁻⁹ m and angle θ =6.33°, we get

d = [3 x 490 x 10⁻⁹ /sin 6.33°]

d = 13.33 x 10⁻⁶ m

Thus, the separation between the lines of the grating is 13.33μm.

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By applying the second equation of motion, the speed at which he threw the second stone is equal to 12.10 m/s.

First of all, we would calculate the time taken by the first stone to reach a height of 49 meters by applying the second equation of motion as follows:

S = ut + ½gt²

49 = 0(t) + ½ × 9.8 × t²

49 = 4.9t²

t² = 49/4.9

t = √10

t = 3.16 seconds.

Now, we can determine the speed at which he threw the second stone:

Note: Time = 3.16 - 1 = 2.16 seconds.

S = ut + ½gt²

49 = u(2.16) + ½ × 9.8 × 2.16²

49 = 2.16u + 22.86

2.16u = 49 - 22.86

u = 26.14/2.16

u = 12.10 m/s.

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Answer:

A

Explanation:

A has the most potential energy as it is higher up so it has the most gravitational potential energy.

Temperature is increased the pressure also increases due to fast movement of molecules because of more energy.

The temperature of the gas is directly proportional to the pressure. Faster moving particles will collide with the walls of the container that put force on the wall which leads to increase in pressure.

So we can conclude that temperature is increased the pressure also increases due to fast movement of molecules because of more energy.

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The magnitude of the acceleration of the car is determined as 1.11 m/s².

The acceleration of the train is determined as the rate of change of velocity with time.

The magnitude of the acceleration of the car is calculated as follows;

a = v/t

a = 50/45

a = 1.11 m/s²

Thus, the magnitude of the acceleration of the car is determined as 1.11 m/s².

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Answer:

Mass

The kilogram (kg) is the SI unit of mass and it is the almost universally used standard mass unit.

Gravity and weight

Since the acceleration due to the force of gravity (g) equals aproximately 9.8 meters/s2, the weight of an object with a mass of 1 kilogram is 9.8 newtons under standard conditions on the Earth's surface.

Answer:

The mass of an object is a measure of the object's inertial property, or the amount of matter it has in it

The weight of an object is a measure of the force/impact  exerted on the object by gravity, or the force needed to support it

The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s2.

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Answer:

A wheel on a car, however, rotates around the car's axle, so it does have rotational motion. For this example, if you were to pick a single point on the edge of the wheel, you could also say that it has circular motion.

Answer:

I say 150 because i aded 850+150= 1000 so yea thats how i got my answer

Explanation:

Explanation:

w = mg

on earth

w = mg

w = 60 × 9.8 = 588 N

on moon

w = mg

w = 60 × 1.6 = 96 N

on Mars

w = mg

w = 60 × 3.7 = 222 N

In this question,we solve it using the formulae below:

W=mg.

So to find the weight of the object in 1.Earth.Enter the given data on formula:

W=mg

W=60×9.8

2.Weight on the moon.

W=mg

W=60×1.6

3.Weight on Mars.

W=mg

W=60×3.7

The force of gravity vary inversely with square of distance between two objects.

The force of attraction felt by a person which is directed at the center of a planet or Earth is called as the gravity.

The force of attraction is directly proportional to the product of masses of the object and inversely proportional to the square of distance between them.

F = GMm/d²

here G is the gravitational constant.

If the distance changes, the force of gravitation changes. The mass remains the same.

Thus, the force of gravity vary inversely with square of distance between two objects.

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The spinning turbine converts mechanical energy into electrical energy that is converted into light energy used to light up the house.

The law of conservation of energy states that energy can neither be created nor destroyed but can be transformed from one form to another.

The spinning turbine works on the principle of mechanical energy.

Thus, the spinning turbine converts mechanical energy into electrical energy that is converted into light energy used to light up the house.

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Answer:

Explanation:

given :-

force applied = 117.6N

Area = 20 m^2

Pressure =?

solution:-

Pressure = Force / Area

= 117.6 N / 20 m^2

= 5.88 Pascals

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Explanation:

Answer:

Option C

Explanation:

According to the formula

So

If we use wide wire we increase the area of cross section so resistance decreases

Answer:

The area estimate is somewhat inaccurate because the length * width of the shoe will be an inaccurate measurement of the area of the shoe that actually contacts the floor.

Answer:

There is a net force of 2 N to the left.

With 8 N to the left the up/down and left/right forces are in balance.

The force left over is 2 N to the left.

Answer:

Absolutely no real-life phenomena/ uses are possible that are related to any branch of physics, except:

1 The device you are reading this answer on. (quantum mechanics, electronics )

2 The air conditioner in your room. ( electromagnetism, electronics )

3 The satellites and space stations in space which will help in the deciphering of the universe will help us look for a suitable planet when we render the earth useless. ( general and special relativity, classical mechanics )

4 Ohh. I forgot, do you wear clothes, well they are made in factories where factories run on the principles of thermodynamics, which is physics.

5 Ever gone somewhere? Well, the transportation uses classical mechanics, thermodynamics, electromagnetism, relativity ( if you know Global Positioning System )

6 GPS itself! It’s used in online maps, navigating, and this sort of stuff. It works on general relativity.

Honestly, this list is endless.

Total internal reflection causes light to be completely reflected across the  boundary between the two media but not transmitted.

The term total internal reflection occurs when light is moving from a denser to a less dense medium such as from glass to air. This phenomenon occurs at the interface between the two media.

There are two conditions necessary for total internal reflection and they are;

1) Light must travel from a denser to a less dense medium

2) The angle of incidence in the denser medium must be greater than the critical angle.

Total internal reflection causes light to be completely reflected across the  boundary between the two media but not transmitted.

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By applying the relationship of side lengths to interior angles in a triangle, a possible measure of line segment TS is 4.0 ft.

In Geometry, the relationship of side lengths to interior angles in a triangle include the following:

Based on the above theory, we can logically deduce that angle GF < TS or TS > GF because 42° is greater than 56°.

TS > 3.2 ft.

Therefore, a possible measure of line segment TS is 4.0 ft.

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Complete Question:

In the triangles, TR = GE and SR = FE. If Line segment G F = 3.2 ft, which is a possible measure of Line segment TS? 1.6 ft 3.0 ft 3.2 ft 4.0 ft.

Answer:

Explanation:

Remark

If both are trying to get the box into storage and they can only  use lifting to do it, then Jude won't be able to do it. This assumes they cannot slide the boxes. Jude is not using enough force to overcome gravity so the box will just sit.

On the other hand Jamel is putting enough force to not only lift the box but it will move upwards against gravity. If we ignore that fact, then Jamel will get his box into storage.

Answer: A

The maximum height the ball will reach 7.316 ft. This height is less than a standard soccer goal's height.

When an object is thrown at an angle from the horizontal direction, the object is said to be in projectile motion. The object which follows the projectile motion is called the projectile.

Maximum height reached is given by

H = u²sin²θ /2g

where, u = initial velocity, θ is the angle of projection and g is the gravitational acceleration.

Consider the soccer ball is kicked toward a goal at a speed of 35 mph and an angle of 25 ° from horizontal,

Given is the speed 35mph = 35 x 1609/3600 = 15.65 m/s, θ =25 ° and g = 9.81 m/s²

Substituting the values, we get

H = (15.65)² (sin25 °)² / 2 x 9.81

H = 2.23 m

in feet, H = 7.316 ft

Thus, the maximum height is 7.316 ft. This height is less than  a standard soccer goal's height, which is 8 feet from the ground.

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