Question

(a) When does a force do work?
(b) State two examples when a force acting on a
body does not do any work.
(c) State the mathematical expression of work.
(d) Name the SI unit of work.​

Answer 1

Answer:

See Explanation tq

Explanation:

A)A force is said to do work when it acts on a body so that there is a displacement of the point of application in the direction of the force.

C)W = F ⋅ s; W = τ θ

D)The SI unit of work is the joule (J).