Q. A body weighs 200 N on the surface of the earth. How much will it weigh half way down to the centre of the earth ?
A) 150 N
B) 200 N
C) 250 N
D) 100 N
Explanation
[Solution] $g_d = g(1 - d/R) = g/2$ at d = R/2, so weight = 100 N. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.