A machine does 350 J of work in 7 s. What is its power?
Answer and explanation
Correct answer: D. 50 W
- Step 1: Power = work / time.
- Step 2: 350 / 7 = 50 W.
Answer
50 W.
Why not the others: 0.02 W: time was divided by work. 2450 W: work and time were multiplied. 343 W: time was subtracted from work.
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