Exam-style question
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A machine does 5000 J of work in 10 seconds. Calculate the power output of the machine.
- A.500 W
- B.1000 W
- C.200 W
- D.50 W
Model answer
What a good answer should say
- 500 W
Explanation
Why this works
Power (P) is calculated using the formula P = W / t. Here, W = 5000 J and t = 10 s.
Substituting these values gives P = 5000 J / 10 s = 500 W. Thus, the power output of the machine is 500 W.
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