Published by:
CGP EDU Academic Team
Published on: September 12, 2026
A small block of super dense material has mass 2 × 10 24 kg. It is at a height h << R. It falls towards earth. Find its speed when it is at a height h/2 -
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
m = 2 × 10 24 kg, M earth = 6 × 10 –24 kg
= 
From momentum conservation, MV 1 = 
V 2
From energy conservation V 1 = V 2 /3
MV 1 2 + 
V 2 2
= 
– 
∴ V 2 = 
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