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प्रश्न
A coolie, with a load of 30 kg on his head, walks on the platform. If he walks a distance of 60 m, what is the work done by him?
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उत्तर
The work done by the coolie is zero because there is no displacement of’ the load in the direction of force, which he is applying vertically upwards.
संबंधित प्रश्न
Can there be displacement of an object in the absence of any force acting on it? Think. Discuss this question with your friends and teacher.
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