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Q: A worker takes 10 kg of goods from the ground and puts it on 1.1m above the land on his head. What will be the work done by the worker.
  • A. 140J
  • B. 155J
  • C. 165J
  • D. 110J
Correct Answer: Option D - Given that, m = 10 kg, g = 10 m/s ², h = 1.1 m As workdone by an object is equal to the potential energy stored in an object. Therefore, W= mgh = 10× 10 ×1.1 = 10×10×11/10 = 110J
D. Given that, m = 10 kg, g = 10 m/s ², h = 1.1 m As workdone by an object is equal to the potential energy stored in an object. Therefore, W= mgh = 10× 10 ×1.1 = 10×10×11/10 = 110J

Explanations:

Given that, m = 10 kg, g = 10 m/s ², h = 1.1 m As workdone by an object is equal to the potential energy stored in an object. Therefore, W= mgh = 10× 10 ×1.1 = 10×10×11/10 = 110J