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A force F acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of force. Write the expression for the work done by the force. - Physics

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Question

A force F acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of force.

Write the expression for the work done by the force. 

Answer in Brief
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Solution

Work done = Force × displacement

However, when a force causes the body to move in a direction different from the force's direction.

Then work done W = Force × the component of body displacement in the direction of force.

W = F × S Cos θ

∴ W = F S Cos θ

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Chapter 2: Work, Energy and Power - EXERCISE - 2(A) [Page 27]

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Selina Physics [English] Class 10 ICSE
Chapter 2 Work, Energy and Power
EXERCISE - 2(A) | Q 3. (a) | Page 27
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