Q11 of 31 Page 143

Why will sheet of paper fall slower than one that is crumpled into a ball?

Sheet of paper will fall slower because due to larger​ surface area the amount of upward Gravitational force causes resistance to its movement. The air resistance would make the actual force lesser than that imparted by the gravity of earth and hence slowing down the speed of sheet of paper.


More from this chapter

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9

What do we call the gravitational force between the earth and an object?

 10

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

 12

Gravitational force on the surface of moon is only as strong as gravitational force on the earth. What is the weight in Newton’s of a 10 kg object on the moon and on the earth?

 13

A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate:

(i) The maximum height to which it rises.


(ii) The total time it takes to return to the surface of the earth.