NCERT Solutions for Chapter: Work and Energy, Exercise 1: Exercise

Rahul pushed four toy cars on a surface.
The picture shows the distance each toy car travelled before coming to a stop.

In pushing which car was the work done by Rahul the greatest?

In which of these conditions is the work done negative?

The picture shows a ball bouncing several times before coming to stop.

At which point was the potential energy of the ball maximum?

What would be the shape of the ball at the moment it hit the surface?

Which of these factors caused the ball to stop bouncing?

Four persons separately pulled a$100 \mathrm{kg}$ cart for a distance of $500 \mathrm{m}$.

The table shows the time each person took to cover the distance with the cart.

What must be kept the same in the activity to make a valid conclusion?

Which of these involves the conversion of kinetic energy to potential energy?

The work done by a boy in lifting his bag up to a height of $2 \mathrm{m}$ is $200 \mathrm{J}$. Find the mass of his bag. (Take $=10 \mathrm{m} {\mathrm{s}}^{-2}$)