Question detail
A pump does 1800 J of work in 15 seconds. What is the power output of the pump?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
- A. 120 W
- B. 150 W
- C. 100 W
- D. 200 W
Answer
120 W
Explanation
The correct option is "120 W". 120 W is right because it directly matches Power: Calculate power using work done divided by time.. The other options are less suitable because they change the required Physics relationship, confuse the relevant energy store or use a distractor that does not answer the question.
Common mistake
Common Mistake in Power Calculation
Students often confuse the units of power and work done, mistakenly using joules for power instead of watts.
Remember that power is measured in watts (W), which is equivalent to joules per second (J/s). Always ensure you convert work done into the correct units before calculating power.
Related flashcards
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