Question

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

Answer 1

W=10N*3/10m
=3Joule

Answer 2

Hello friend
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Given :

Force (F) = 10 N

tetha= 0° ..........(since force and displacement are in same direction)

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

We have to find:

Work (W) = ?

So,we know that:

W = Fs cos tetha

By putting the value we get,

W = Fs cos tetha

W = 10 x 30/100 x cos 0

W = 30/10 x 1 .............( cos 0 = 1 )

W = 3 J

Therefore, the work done by Ravi is 3 J.

Hope it helps you.

Thanks.