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प्रश्न
A toy is acted upon by a force.
State two conditions under which the work done could be zero.
अति संक्षिप्त उत्तर
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उत्तर
The work done could be zero under these two conditions:
- When there is no displacement of the toy, even though a force acts on it.
- When the force is perpendicular to the displacement, i.e. the angle between force and displacement is 90°.
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