An object of mass 1 kg falls from height 100 m from resting condition. Calculate its velocity while touching the ground.

A body of mass 10 kg falls from a height of 10 m. What will be its kinetic energy just before it touches the ground ? Prove that, this kinetic energy is equal to the potential stored at the initial position of the body. [g=980 cm *s^(-2) ]

A body of mass 1 kg falls to the ground from the roof of a building 20 m high. Find its (ii) velocity when it reaches the ground,

A rubber ball of mass 100 g falls from a height of 1 m rebounds to a height of 40 cm. Find the impulse and the average force between the ball and the ground if time during which they are in contact was 0.1 s.

A soldier fires a bullet horizontally from the top a cliff with a velocity of 10 m *s^(-1) . If the bullet strikes the ground after 2s , find the height of the cliff. Also calculate the velocity with which the bullet strikes the ground .

A balloon rising vertically up with uniform velocity 15 "m.s"^(-1) releases a ball at a height of 100 m. Calculate the time taken by the ball to hit the ground. Take g = 10"m.s"^(-2) .

A body of mass 1 kg falls to the ground from a height of 1km. If the entire amount of energy is converted into heat , find out the amount of heat produced. (J = 4 cdot 1 xx 10^(7) erg cdot cal^(-1)) .

Calculate the potential enrgy of a body of mass 50 kg raised to a height of 4 m above the ground. If the body falls down under gravity freely, then what will be its velocity when it just touches the ground ? (Given g=9.8 m//s^(2))

A body of mass 10 kg is thrown vertically upwards with a velocity of 2m*s^(-1) from top of a tower of height 10 m . What will be its kinetic energy when it strikes the ground ?