Question

Activity 1
Classify the following examples into two columns work done or
work not done.
1.
IL
III.
IV.
V.
VI.
VII.
VIII.
A person carries some goods on a handcart.
One applied a force on a big rock but fails to move it
A student reads a book.
A worker climbs a staircase with some load on his head.
The revolution of the earth around the sun.
An engine is pulling a train.
A wind mill is lifting water from a well.
Food grains are getting dried in the sun.
Work done
Work not done​

Answer 1

Explanation:

Work done is the product of Force and distance. If force is applied and if there is some displacement(change from initial position), then work is said to be done.

Work done = Force x displacement

A person carries some goods on a handcart.(Work done)

One applied a force on a big rock but fails to move it (NO work done)

A student reads a book. (NO work done)

A worker climbs a staircase with some load on his head (Work done).

The revolution of the earth around the sun (NO work done).

An engine is pulling a train (Work done, provided train is also moving).