Work done by Swaralee to carry a bag in 40s . How much power has she used?
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Answer:Power = Force × velocity (if both are vectors, take rhe dot product)
Assuming she is on earth and gravity is 9.8 m/s²,
(20 kg x 9.8 m/s²) × (5 m/20 s) = 196 N × 0.25 m/s = 49 W
This ignores the power exerted to carry herself up the 5 m, and is commonly how tractors, locomotives, etc. are rated.
Explanation:
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