Distinguish between elastic and inelastic collisions.
Work, Energy and Power
Original Khojo Papers practice question — not from a past board paper.
The work done by the net force acting on a body equals the change in its kinetic energy.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
It follows directly from Newton's second law and the equation v2 = u2 + 2as.
From the same topic and chapter, at a similar level.
Distinguish between elastic and inelastic collisions.
Work, Energy and Power
What is a conservative force? Give two examples and state one property.
Work, Energy and Power
A force of 50 N acts on a body and moves it 4 m at 60° to the direction of the force. Find the work done.
Work, Energy and Power
A pump lifts 600 kg of water through 10 m in 30 s. Find its power. Take g = 10 m s−2.
Work, Energy and Power
A body of mass 2 kg falls freely from rest through 20 m. Find its kinetic energy on reaching the ground and its momentum. Take g = 10 m s−2.
Work, Energy and Power
A body of mass 4 kg moving at 6 m s−1 collides head-on with a stationary body of mass 2 kg and they move off together. Find their common velocity.
Work, Energy and Power