Q. If the earth rotates faster than its present speed, the weight of an object will
A) Increase at the equator but remain unchanged at the poles
B) Decrease at the equator but remain unchanged at the poles
C) Remain unchanged at the equator but decrease at the poles
D) Remain unchanged at the equator but increase at the poles
Explanation
(b) $g^{'} = g - \omega^{2}R\cos^{2}\lambda$
Rotation of the earth results in the decreased weight apparently. This decrease in weight is not felt at the poles as the angle of latitude is $90{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.