Aman 
mass is standing in a gravity free space at a height of 10 
above the floor. He throws a stone of 0.5 kg mass downwards with a speed 2 
. When the stone reaches the floor, the distance of the man above the floor will be
A
9.9 
B
10.1 
C
10 
D
20 
Text Solution
Verified by ExpertsThe correct answer is:
B
: Since the man is in gravity free space, force on man 
stone system is zero.
Therefore, centre of mass of the system remains at rest. Let the man goes 
above when the stone reaches the floor, then
Therefore, final height of man above floor 
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