A body weighs less at the equator than at the poles because: 1. earth rotates about its axis.

Question

Consider the following statements: 

A body weighs less at the equator than at the poles because: 

1. earth rotates about its axis. 

2. the ice cap at the poles increases gravitational pull. 

3. equatorial diameter is greater than the polar diameter. 

4. of some unknown facts.

Which of the statements given above is/are incorrect? 

(a) 1 and 2 

(b) 3 only 

(c) 1 and 3 

(d) 4 only

Answer 1

The correct option is: (d) 4 only

Explanation:

For a given point on the surface of earth, g decreases as w increases. Hence, body weighs less at the equator than at the poles also equatorial diameter is greater than polar diameter, 

so according to g = GM ,/ R^2, value of g decreases.