Question

If one motor has three times as much power as another, then the smaller power motor: A. can do the same work in the same time. B. can do the same work in three times the time. C. can never do the same work as the larger motor. D. can do the same work in one-third the time.

Answer 1

Answer:B

Explanation:

Given

First motor has three times as much as power as another

Let the power of smaller motor be P

Therefore bigger motor has power 3 P

and we know that energy $E=power\times time$

Larger motor $E=3P\times t=3Pt$

Smaller motor $E=P\times 3t=3Pt$

Therefore smaller motor will do same work if it takes three times the time taken by Larger motor