Lakhmir Singh and Manjit Kaur Solutions for Chapter: Gravitation, Exercise 2: Short Answer Type Questions

Write the differences between mass and weight of an object.

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

A force of $20 \mathrm{N}$ acts upon a body whose weight is $9.8 \mathrm{N}$. What is the mass of the body and how much is its acceleration. $\left(g=9.8 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{${\mathrm{s}}^2$}\right.\right)$

A stone resting on the ground has a gravitational force of $20 \mathrm{N}$ acting on it. What is the weight of stone? What is its mass ? $(g=10 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{${\mathrm{s}}^2$}\right.)$

An object has mass of $20 \mathrm{kg}$ on earth. What will be its mass on the moon? ($g$ on moon $=1.6 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{${\mathrm{s}}^2$}\right.$)

An object has mass of $20 \mathrm{kg}$ on earth. What will be its weight on the moon? ($g$ on moon $=1.6 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{${\mathrm{s}}^2$}\right.$)

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

How much is the weight of an object on the moon as compared to its weight on the earth? Give reason for your answer.

It is difficult to lift heavy weights on the earth but it becomes very easy to lift the same heavy weights on the moon. Why?