A) 32 N
B) 56 N
C) 72 N
D) Zero
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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