Question

If the weight of an object on earth's surface is 400 N, then weight of the same particle at a depth $\frac{R}{2}$ from surface would be (R is radius of earth)

• A. 100 N
• B. 300 N
• C. 200 N
• D. 250 N

Answer 1

Answer: (C)

200 N

Answer 2

The correct option is (C): $200 N$
$W' = W[1-(R/2)/R]$
$W' = 400(1 - 1/2)$
$W' = 200 N$