Question

A man of 50 kg mass is standing in a gravity free space at a height of 10 m above the floor. He throws a stone of 0.5 kg mass downwards with a speed 2 m/*. When the stone reaches the floor. the distance of the man above the

(a) 9.9 m

(b) 10.1 m

(c) 10 m

(d) 20 m

Answer 1

Correct option (b) 10.1 m

Explanation:

Since the man is in gravity free Man space, force on man + stone system is zero.

Therefore centre of mass of the system *** at Lest. Let the man goes x m above when the stone reaches the floor, the

x = 0.1 m

Therefore final height of man above floor = 10 + x = 10 + 0.1 = 10.1 m