Page 81 - Force 10

13. Why is the value of ‘g’ more in Terai than in mountain?

The acceleration due to gravity is inversely proportional to the

1
square of distance from the center of the earth (i.e.. g∝ ). As

2
the distance of the Terai from the centre of the earth is smaller

than that of the mountain. Hence, the value of ‘g’ is more at

Terai than at the mountain.

14. At what condition the acceleration of a falling parachute is

approximately zero while getting down from a parachute?

When a parachute falls down, it is pulled downward by a certain

force of gravity. Air provides the upthrust and opposes the

downward movement of the parachute and the net force will be

zero. Due to this when the parachute falls with uniform velocity, at

that condition the value of acceleration due to gravity is

approximately zero.