Kinetic Energy

Q.

Statement 1: A positive work can increase the kinetic energy.

Statement 2: A force does a positive work on an object when the displacement is in the direction of force itself.

1. Both the statements are true and statement 2 is not the correct explanation of statement 1.

2. Statement 1 is true but statement 2 is false.

3. Statement 1 is false but statement 2 is true.

4. Both the statements are true and statement 2 is the correct explanation of statement 1.

Q.

Two bodies of mass 3 kg and 1 kg have equal momentum. Ratio of their kinetic energy is:

1. 1:1

2. 9:1

3. 2:1

4. 1:3

Q.

The momentum of a bullet of mass 5 kg fired from a gun is 10 kg.m/s. The kinetic energy of the bullet will be:

1. 10 KJ

2. 10 J

3. 25 KJ

4. 25 J

Q.

What is energy of motion called?

1. Kinetic Energy

2. Rover

3. Magma

4. Ambient Air Temperature

Q.

A body of mass $10kg$ is moving with velocity $4m/s$. If P is the momentum associated with the body and K.E. is the kinetic energy. Then K.E. and P of the body are:

1. 200 J and 160 kg m/s

2. 400 J and 40kg m/s

3. 80 J and 160 kg m/s

4. 80 J and 40 kg m/s

Q. Flowing water possesses which form of energy?

1. Electrical energy
2. Potential energy
3. Gravitational energy
4. Kinetic energy

Q.

What kind of energy is possessed by a running athlete?

1. Potential energy

2. Electrical energy

3. Kinetic energy

4. Nuclear energy

Q.

Which of the following quantities has the greatest influence on the amount of kinetic energy that a car possesses while moving on the road?

1. Velocity

2. Mass

3. Distance travelled

4. Time travelled

Q. A bullet of mass $100g$ has attained a velocity of $1080km{h}^{-1}$ towards the target. What would its kinetic energy be at that moment?

1. $4500J$
2. $4240J$
3. $4300J$
4. $4750J$

Q.

In a freely falling body, the interchange of potential to kinetic energy takes place:

1. gradually from kinetic to potential

2. gradually from potential to kinetic

3. similar to a pendulum

4. alternately between kinetic and potential