Power and Work Done Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Power is the rate of...
- A. Distance travelled
- B. Energy transfer
- C. Force applied
- D. Charge flow
2. What is the equation for power in terms of work done?
- A. P = Fd
- B. P = W/t
- C. P = mgh
- D. P = mcΔθ
3. A motor does 2400 J of work in 6 s. What is its power?
- A. 100 W
- B. 400 W
- C. 600 W
- D. 1440 W
4. Two cranes lift identical loads to the same height. Crane X takes 5 s, Crane Y takes 10 s. Which statement is correct?
- A. Crane X is less powerful
- B. Crane Y is more powerful
- C. Crane X is more powerful
- D. Both are equally powerful
5. A pump has a power output of 250 W. How much energy does it transfer in 2 minutes?
- A. 500 J
- B. 3000 J
- C. 15000 J
- D. 30000 J