Question detail
A machine does 5000 J of work in 10 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 10 seconds. Calculate the power output of the machine.
Answer
500 W
Explanation
The power output is calculated using the formula power = work done / time. This question tests the understanding of the relationship between work and power. This answer is linked to Power because it applies the learning objective: Identify power in watts, energy transferred in joules, work done in joules and time in seconds.. It shows the Physics relationship clearly and keeps energy, power, work done and efficiency terms distinct where they appear.
Common mistake
Confusing Units of Power
Students often confuse watts with joules, thinking they are the same unit.
Remember that watts measure power (rate of energy transfer), while joules measure energy. 1 watt is equivalent to 1 joule per second.
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