Q3 of 11 Page 67

What is meant by the terms mass and weight?

The mass is the fundamental property of a body that is a measure of its resistance to change in the state of motion. It also describes the strength of its mutual gravitational force of attraction to other bodies. It does not depend on the value of g. It is measured by a beam balance.
The weight of a body is the force with which earth pulls the body towards its centre.

Weight(W)=mass(m)×Acceleration due to gravity(g)
W=mg
It changes with the change in the value of g. It is measured by a spring balance.


More from this chapter

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1

If the distance between two bodies that attract each other is trebled, how many times will their mutual force of attraction be?

(9 times, 3 times, 1/3, 1/9).

 2

A body, the mass and the weight of which were already determined as the Equator, is now placed at the Pole. In this context, choose the correct statement from the following:

a. Mass does not change, weight is maximum


b. Mass does not change, weight is minimum


c. Both mass and weight are maximum


d. Both mass and weight are minimum.

 3

Are they vector or scalar quantities? Why?

 3

The mass of a body is 30 kg. What is its weight on earth?
(g = 9.8 ms-2)