Page 76 - Force 10
P. 76
Give Reasons:
Q.3. Weight of an object varies from place to place on the earth,
why?
The earth is not perfectly sphere rather it is flattened from the poles
and buldge out from equator through radius of the earth. So, radius of
the earth changes from place to place. Change in radius causes the
weight to change from place to place. Since, weight is inversely
1
proportional to the square of radius of heavenly body (i.e.. W∝ )
2
keeping mass of heavenly body and mass of an object constant.
Q.4. The weight of an object gradually decreases on climbing up a
mountain, why?
On climbing up the mountain, the distance between the object
and the centre of the earth increases. Increase in distance decrease
the weight since weight of an object is inversely proportional to the
1
square of distance between heavenly bodies (i.e.. W∝ ) keeping
2
the mass of heavenly body and mass of an object constant.
