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प्रश्न
A toy car is acted upon by a force. State two conditions under which work done is zero.
लघु उत्तरीय
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उत्तर
Work done is zero if:
- The force causes no displacement of the toy car.
- The displacement is perpendicular to the force (the angle between them is 90°), so the force has no component in the direction of displacement.
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