Gravitation Question 42

Question: An object weights 72 N on earth. Its weight at a height of R/2 from earth is [AIIMS 2000]

Options:

A) 32 N

B) 56 N

C) 72 N

D) Zero

Show Answer

Answer:

Correct Answer: A

Solution:

$ [{g}’=g{{\left( \frac{R}{R+h} \right)}^{2}}=g{{\left( \frac{R}{R+\frac{R}{2}} \right)}^{2}}=\frac{4}{9}g] $

$ [\therefore W’=\frac{4}{9}\times W=\frac{4}{9}\times 72=32N] $



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