Question

A force of 20 N displays a body through a distance of 1 m at an angle of 60° from its own direction. Calculate the amount of work done.

Answer 1

Given

Force (F) = 20 N

Displacement (s) = 1 m

Angle between force and displacement θ = 60°

★ Work (W) = Fs cos θ

= 20 × 1 × cos 60°

= 20 × 1 × ½

= 10 J

Answer 2

Answer:

We simply know that 》

WORK=FORCE×DISPLACEMENT

but here in this formula angle of the force applied is absent..

With the angle of force applied

Formula become》

WORK DONE=FORCE×

DISPLACEMENT×COS°

So, now let us see the question》

In the question

Force applied=20N

Displacement=1m

And angle of force=60°

So,

Work done=20×1×cos 60°

( NOW, COS60°=0.5 )

So,work done=20×1×0.5

=20×0.5

=10J

So the work done is equal to 10J.

ANSWER.

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