Q.7. Solve the following problems.
(a) Radha takes 15 s to carry a bag weighing 18 kg to a height 5 m. How much power has she used?
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Explanation:
Power = Force × velocity (if both are vectors, take rhe dot product)
Assuming she is on earth and gravity is 9.8 m/s²,
(18 kg x 9.8 m/s²) × (5 m/15 s)
= 176.4 N × 0.33 m/s
= 58.212 W
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