Question

What is the work done by a boy in pushing a book with a force of 5 Newton and displacing it through 20 CM along the push

Answer 1

workdone by the boy in pushing the book is 1 Joule.

workdone is the dot product of force applied on the object and displacement of the object.

in simple way, W = F.Scosθ

when direction of displacement is along direction of force. then, θ = 0°

that means, W = F.S

here, force , F = 5N and displacement, S = 20cm = 0.2 m along the force.

so, workdone , W = F. S = 5N × 0.2 m = 1 J

also read similar questions : A boy applies a force of 25 N to push a box . Calculate the displacement of the box if the totals work done is 225 J .

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Answer 2

$\huge\bold\purple{Answer:-}$

workdone is the dot product of force applied on the object and displacement of the object.

in simple way, W = F.Scosθ

when direction of displacement is along direction of force. then, θ = 0°

that means, W = F.S

here, force , F = 5N and displacement, S = 20cm = 0.2 m along the force.

so, workdone , W = F. S = 5N × 0.2 m = 1 J