AP Physics 1 Question 219: Answer and Explanation
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9. A force of 200 N is required to keep an object sliding at a constant speed of 2 m/s across a rough floor. How much power is being expended to maintain this motion?
- A. 50 W
- B. 100 W
- C. 200 W
- D. 400 W
Correct Answer: D
Using the equation P = Fv, find that P = (200 N)(2 m/s) = 400 W.