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Work, Energy and Power — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsWork, Energy and Power2 Marks
Question
A body is acted upon by a force. State two condition when the work done is zero.
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Answer

Two conditions when the work done is zero are:
(i) When there is no displacement (S=0) and,
(ii) When the displacement is normal to the direction of the force (θ=90o).

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