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] $
