Amit buys few grams of gold at the poles as per the instruction of one of his friends. He hands over the same when he meets him at the equator. Will the friend agree with the weight of gold bought ? If not, why ? [Hint. The value of g is greater at the poles than at the equater.]

Explanation

We have learnt that value of g is greater at the poles than at the equater, i.e., `g_(e) gt g_(e)`.
As weight of gold at poles, `W_(p)=mg_(p)`and weight of gold at equater,`W_(e)=mg_(e)`,
therefore, `W_(p) gt W_(e)` or `W_(e) lt W_(p)`
i.e., weight of gold at the equator will be less than the weight of gold at the the poles. Obviously, the freind at equator will not agree with the weight of gold bought at poles.