Question

The weight of an object in a coal mine , sea level ,and at top of mountain are W1 , W2 , and W3 respectively then__________________
a)W1 <W2>W3
b)W1=W2=W3
c)W1 >W2 <W3
d)W1< W2< W3
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Answer 1

Answer:

a

Explanation:

At the surface of earth, the value of g=9.8m/sec2. If we go towards the centre of earth or we go above the surface of earth, then in both the cases the value of g decreases.

Hence W1=mgmine,W2=mgsealevel,W3=mgmountain

So W1<W2>W3 (g at the sea level =g at the surface of earth