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).

If he weighs 100 N on the moon, what is the acceleration due to gravity on the moon?

The weight of an object at the centre of the earth of radius R is:

A. Zero

B. R times the weight at the surface of the earth.

C. Infinite

D. 1/R² times the weight at the surface of the earth

Which is more fundamental, the mass of a body or its weight? Why?

Distinguish between mass and weight of a body. When does a body experience weightlessness?

A solid ball and a hollow ball of the same size, are dropped from a height. The solid ball falls faster to the ground. Why?

A person weighs 600 N earth. Find his mass (g = 10 ms^-2).

The weight of an object:

A sheet of a paper falls slower than a coin under gravity through the air. Why?

Raju goes to the vegetable vendor in the market. He notices that the needle of the balance is not in the centre of the balance. He takes the stuff, gets its mass checked in an electric balance and gets back to the vendor asking him to change the balance.

(a) How would you treat the vendor if you were in Raju’s place?

(b) Which values of Raju are noteworthy?

(c) Why is it important to check the weight of substance before buying it?