Question

If earth were to rotate faster than its present speed, the weight of an object

• A. increase at the equator but remain unchanged at 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

Answer 1

The correct option is B decrease at the equator but remain unchanged at the poles

As the earth rotates faster, the centrifugal force on a body at the equator increases, thus decreasing the weight of the body. But since the poles lie on the axis of rotation, the centrifugal force on a body at the poles is 0. Therefore at the poles, the weight is unaffected.