A man who falls from a height on a cement floor receives more injury than when he falls from the same height on the heap of sand Explain ?

Two balls have the same size but one is denser than the other. Assume the air resistance to be same on each, show that when they are released simultaneously from the same height, the heavier ball will reach the ground first.

A body of 0.02 kg falls from a height of 5 mts into a pile of sands. The body penetrates the same at the distance of 5cm before stopping. What force the sand exerted on the body ?

Two bodies of mass M and m are allowed to fall from the same height. If the air resistance for each be the same, then will both the bodies reach the earth simultaneously?

A rubber ball of mass 0.05 kg falls from a height of 1 m and rebounds to a height of 0.5 m. Find the average force when their contact was 0.1 sec.

A stone falls from a cliff and travels 24.5 metres in the last second before it reaches the foot of the cliff. Find height of the cliff.

Sand is pouring from a pipe at the rate of 12 cm^3// s. The falling sand from a cone on the ground in such a way that the height of the cone is always one-sixth of the radius of the base. How fast is the height of the sand cone increasing when the height is 4 cm.

Why is that a parachute descends slowly whereas a stone dropped from the same height falls rapidly.?