Work

A horse pulls a cart that requires a force of $200 \mathrm{N}$. Here, the work done in pulling the cart to a distance of $250 \mathrm{m}$ is $\mathrm{K}\times {10}^4 \mathrm{J}$. Find the value of $\mathrm{K}$.

A pair of bullocks exerts a force of $140 \mathrm{N}$ on a plough. The field being ploughed is $15 \mathrm{m}$ long. How much work is done in ploughing the length of the field?

A horse pulls a cart that requires a force of $200 \mathrm{N}$. How much work is done in pulling the cart $250 \mathrm{m}$?

If the _____ of an object is zero, work done on it is also zero.

A force of $7 \mathrm{N}$ acts on an object through a distance of $8 \mathrm{m}$ in its own direction. The work done is

If the force applied on a body decreases, then the work done on it will

In case of negative work the angle between the force and displacement is

The SI unit of work is :

In case of negative work the angle between the force and displacement is

Give one difference between scalar quantity and vector quantity.

Give one example of scalar quantity.

Define scalar quantity.

State two conditions in which work done due to a force applied on a body is zero.

List two essential conditions for work to be done.

Raman tries to push the wall of his room and can't move it. How much work is done by him?

Define the term 'work'.

When is work done equal to one joule?

How much work against gravitational force does a girl do, carrying a bag of $3 \mathrm{kg}$ mass on her back and moving $200 \mathrm{m}$ along a levelled road?

Identify whether the work done is positive, negative or zero in the following case.

Identify whether the work done is positive, negative or zero in the following case.