Question

Ravi applied a force of 10 N and moved a book 30 cm in the direction of the force.How much was the work done by Ravi?

Answer 1

Word Done = Force * Displacement
= 10 * 0.3 ( We will change CM To. M)
= 3 Joule Ans

Answer 2

Given: Force (F)= 10N

theta= 0°,. (Since force and displacement are in same direction)

Displacement (s)= 30cm= 30/100m

To find: Work (W)= ?

Formula: Fs cos theta

Solñ: W= Fs cos theta

= 10× 30/100× cos 0

= 30/10× 1. ........(cos 0= 1)

= 3J

The work done by Ravi is 3J.