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Q: What will be the average power required to lift an object of 80 kg to a height of 40 m in 50s ? (g=10m/s² )
  • A. 3200J/s
  • B. 640J/s
  • C. 800J/s
  • D. 600 J/s
Correct Answer: Option B - Power required to lift this weight = mgh/t p = (80 x 10 x 40) / 50 p = 640 J/s
B. Power required to lift this weight = mgh/t p = (80 x 10 x 40) / 50 p = 640 J/s

Explanations:

Power required to lift this weight = mgh/t p = (80 x 10 x 40) / 50 p = 640 J/s