Free Test Work-energy theorem – NEET

Q1: The work-energy theorem is based on the law of?

A. Conservation of momentum B. Conservation of energy C. Newton’s first law D. Newton’s second law

Q2: The work done on a particle is equal to the change in its?

A. Momentum B. Acceleration C. Kinetic energy D. Potential energy

Q3: If net work done is zero, the kinetic energy of a body?

A. Increases B. Decreases C. Remains constant D. Becomes zero

Q4: The SI unit of work and energy is?

A. Newton B. Joule C. Watt D. Erg

Q5: A force of 10 N moves an object by 5 m. Work done is?

A. 15 J B. 5 J C. 50 J D. 100 J

Q6: A 2 kg object speeds up from 3 m/s to 6 m/s. Work done?

A. 27 J B. 54 J C. 18 J D. 36 J

Q7: Kinetic energy is directly proportional to the?

A. Velocity B. Mass squared C. Square of velocity D. Acceleration

Q8: If a body has negative work done, its kinetic energy?

A. Increases B. Decreases C. Remains same D. Becomes infinite

Q9: Work-energy theorem is applicable to which type of forces?

A. Only conservative B. Only non-conservative C. Only external D. All types of forces

Q10: If a force acts perpendicular to displacement, work done is?

A. Maximum B. Zero C. Negative D. Positive

Q11: A body of mass 4 kg is moving at 10 m/s. Kinetic energy?

A. 100 J B. 400 J C. 200 J D. 50 J

Q12: Negative work implies?

A. Energy loss B. Energy gain C. No energy change D. Potential energy increases

Q13: Which has more kinetic energy: 2 kg at 4 m/s or 4 kg at 2 m/s?

A. 2 kg at 4 m/s B. 4 kg at 2 m/s C. Both equal D. Cannot say

Q14: When is the work done by friction positive?

A. When friction aids motion B. Always C. Never D. Depends on speed

Q15: A spring has potential energy because of?

A. Velocity B. Displacement C. Force D. Compression or extension

Q16: Change in kinetic energy = Net work done is statement of?

A. Newton’s third law B. Work-energy theorem C. Law of inertia D. Conservation of momentum

Q17: A body moves under constant force. Then kinetic energy?

A. Remains constant B. Decreases C. Increases linearly D. Increases quadratically

Q18: Kinetic energy of a body depends upon?

A. Only mass B. Only velocity C. Both mass and velocity D. Only acceleration

Q19: If a body is moving in a circular path at constant speed, net work done is?

A. Positive B. Negative C. Zero D. Infinite

Quiz for Work-energy theorem