Avni takes 40 seconds to carry a bag weighing 10 kg to a height of 8 m. How much the power has she used
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Answer:
20 W
Explanation:
Mass = 10 kg
Gravitational force = 10 N/kg
Height = 8 m
Work done
= Force × Distance moved
= mg × h
= (10 × 10) N × 8 m
= 100 N × 8 m
= 800 J
Power spent
= Work done / Time taken
= 800 J / 40 s
= 20 W (Ans.)
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