Factors Affecting Kinetic Energy

Q. The kinetic energy of a person becomeswhen the velocity is doubled.

1. two times
2. three times
3. four times

Q.

What is the SI unit of kinetic energy?

Q. Kinetic energy is the energy an object has due to its .

1. work
2. motion
3. position

Q.

Write an expression for the kinetic energy of an object.

Q.

Give few examples of kinetic energy.

Q.

Identify the energy possessed by a rolling stone.

Q.

Kinetic energy is the energy of a body due to its ________.

Q. A heavy and a light body have equal momentum. Which of the following has greater kinetic energy?

1. Light body
2. Can't determine
3. Heavy body
4. Both have same kinetic energy

Q.

A truck has a mass of 8000 kg, a car has a mass of 1000 kg and a bike has a mass of 100 kg. All the vehicles are moving on a level road at 45m/s. Which object has the highest kinetic energy?

1. truck

2. car

3. bike

4. truck and bike only

Q.

What is the reverse Carnot cycle?

Q.

If the velocity of an object is halved the value of kinetic energy will be?

1. double

2. become a quarter

3. halve

4. remain the same

Q.

The kinetic energy acquired by a body of mass `m’ when potential energy decreases.

1. Increases

2. decreases

3. remains same

4. can't say

Q. Question 21
A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies. Which one has a larger kinetic energy?

Q. A truck has a mass of 8000 kgs, a car has a mass of 1000 kgs and a bike has a mass of 100 kgs. Both the truck and car are moving on a level road at $45m{s}^{-1}$. The bike, however, is going on the same level road at $55m{s}^{-1}$. The kinetic energy will be more for the _______.

1. truck
2. car
3. bike
4. truck and bike only

Q. Consider a Rocket moving with a velocity in outer space. Kinetic energy calculated by a person standing on the moon and by a person on Earth might have different values.

1. False
2. True

Q.

Question 21
A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies. Which one has a larger kinetic energy?

Q. A cyclist doubles his speed. How will his kinetic energy change : Increases, Decreases or remains the same?