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ICSE Class 8 Physics Question 12 of 25

Energy — Question 3

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Question

Question 1(c)

Two coolies A and B do some work in time 1 minute and 2 minute respectively. The power spent is:

  1. same by both coolies
  2. is more by coolie A than by B
  3. is less by coolie A than by B
  4. nothing can be said
Answer

is more by coolie A than by B

Reason — Power spent = Work donetime taken\dfrac{\text{Work done}}{\text{time taken}}.
Since coolie A takes less time than coolie B so power spent by coolie A is more than coolie B.