Question Library

Two balls of equal mass moving with a relative speed of 25 ms\(^{-1}\) in opposite directions collide. If one of the balls stopped immediately after their collision and the other had a final momentum of 15 kg ms\(^{-1}\), what is the mass of each ball?

A body is moving initially at 4m/s. If it's impulse after accelerating at 5m/s\(^2\) for 2s is 60Kgms\(^{-1}\). What is its mass?

What will be the weight of a man of mass 60kg standing in a lift if the lift is descending vertically at 3ms\(^2\)?

The law of conservation of momentum is stated for closed and isolated system. What are the two conditions for a system to be closed and isolated?

A boy of mass 40 kg jumps off a stationary skateboard and moves horizontally with a speed of 1.5 m/s while the skateboard moves in the opposite direction with a speed of 20 m/s. Calculate the mass of the skateboard.

Name the type of equilibrium for each position of the ball

A ball of mass 0.5kg moving at 10ms\(^{-1}\) collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

A lead bullet of mass 0.05kg is fired with a velocity of 200ms\(^{-1}\) into a block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after impact is?

In an elastic collision, momentum is conserved as well as well as?

The diagram above represents balls in an undulating surface. Which of the following option represents positions of stable equilibrium?

A body of mass 12kg traveling at 4.2ms-1 collides with a second body of mass 18kg at rest. Calculate their common velocity if the two bodies coalesce after collision?

I. Jet propelled aircraft II. Rocket propulsion III. The recoil of a gun IV. A person walking Which of the above is based on Newton's third law of motion

The driver in a motor car, of which the total mass is 800kg and which is traveling at 20ms-1, suddenly observes a stationary dog in his path 50m ahead. If the car brakes can exert a force of 2000N, what will most likely happen?