Question detail
A machine does 5000 J of work in 25 seconds. Calculate the power output of the machine.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Energy changes in a system, and the ways energy is stored before and after such changes
Question
A machine does 5000 J of work in 25 seconds. Calculate the power output of the machine.
Answer
200 W
Explanation
This question tests the ability to apply the power formula, which is the rate of work done over time. The calculation shows how to derive power from work and time. This answer is linked to Power because it applies the learning objective: Calculate power using work done divided by time.. It shows the Physics relationship clearly and keeps energy, power, work done and efficiency terms distinct where they appear.
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.
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