Question

2.
For the following situation, state wheather work is done or not .
a) A child swimming in a pool.
b) A woman carrying a suitcase and standing still.
c) A boy sitting and reading a book.
3. What should be the angle between the direction of force and the direction of motion of
a body so that the work done is zero?
numaricals​

Answer 1

2. a) Work is done.

b) No work is done.

c) No work is done.

3. Angle should be 90° between the direction of force and the direction of motion of a body as work done is equal to force multiplied by displacement.

Hope this helps..