A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble:- during its upward motion.

A pebble of mass 0.06 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble:- during its downward motion.

A pebble of mass 0.07 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble:- at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45^@ with the horizontal direction? Ignore air resistance.

A boy of mass 40 kg climbs vertically upwards on a coconut tree to a height of 10m. Calculate the work done by the boy.

A body is projected in vertically upwards direction with a speed u. Find the distance travelled by the body in reaching its topmost point.

A body is thrown vertically upwards with a speed u. When does its potential energy becomes maximum.

A boy of mass 40 kg climbs vertically upwards on a coconut tree to a height of 10m. Calculate the potential energy gained.

A piece of stone is thrown vertically upwards. It reaches the maximum height in 3 seconds. If the acceleration of the stone be 9.8 m//s^2 directed towards the ground, calculate the initial velocity of the stone with which it is thrown upwards.

A body is thrown vertically upwards. Its velocity goes on decreasing. Write the change in kinetic energy when its velocity is zero.