Question

If the speed of rotation of Earth increases, weight of a body will?
A) Increase
B) Decrease
C) Remains the same

Answer 1

b

Answer 2

It should be (b), because if the speed of rotation increases, then the "centrifugal force" increases so the weight should decrease. In terms of forces it is possible the following argument: in the earth ecuador, the force over a body is,
\[F=0=m g-m \omega^2 R\]
But, if the rotational speed increases, the force is,
\[F=m g-m \omega^2 R<0\]
so its "apparent weight" should decrease.

Answer 3

that is why i answerd b