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प्रश्न
Calculate the work done when:
A 5 kg weight is lifted 10 m vertically. (g = 9.8 m/s2)
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उत्तर
Force = m × g = 5 × 9.8 = 49 N; Distance = 10 m
∴ Work done = F × d = 49 × 10 = 490 J.
संबंधित प्रश्न
Define 1 J of work.
A car is running at a speed of 15 km h-1 while another similar car is moving at a speed of 45 km h-1. Find the ratio of their kinetic energies.
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Choose one or more correct alternatives.
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- transferred from one place to another
- concentrated
- transformed from one type to another
- destroyed
Fill in the boxe to show the corresponding energy transformation.

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