Q44 of 176 Page 101

Can a body have mass but no weight? Give reasons for your answer.

Yes, weight of a body is not constant, it varies with the value of acceleration due to gravity, g. Weight of a body is zero, when it is taken to the centre of the earth or in the interplanetary space, where g=0.


More from this chapter

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42

When a cricket ball is thrown vertically upwards, it reaches a maximum height of 5 metres.

(a) What was the initial speed of the ball?


(b) How much time is taken by the ball to reach the highest point? (g = 10 m/s2)

 43

Write the differences between mass and weight of an object.

 45

A force of 20 N acts upon a body whose weight is 9.8 N. What is the mass of the body and how much is its acceleration? (g = 9.8 m/s2).

 46

A stone resting on the ground has a gravitational force of 20 N acting on it. What is the weight of the stone? What is its mass? (g = 10 m/s2).