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 0.05 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 0.07 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 stone is throw in a vertically upward direction with a velocity of 5ms^(-1) if the stone during its motion is 10ms^(-2) in the downward direction . What will be the height attained by the stone and how much time will it take to reach there ?

Give the magnitude and direction of the net force acting on:- a cork of mass 10 g floating on water.

Give the magnitude and direction of the net force acting on:- a kite skillfully held stationary in the sky.

A bomb of mass 1 kg is thrown vertically upwards with a speed of 100 m//s .After 5 seconds it explodes into two fragments .One fragment of mass 400 g is found to go down with a speed of 25 m//s .the second fragment just after the explosion will go (g=10 m//s^2) .

Give the magnitude and direction of the net force acting on:- a drop of rain falling down with a constant speed.