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NUST NET - Practice Test - Physics - Work Energy and Power - Quiz 3

Practice 10 high yield MCQs on Physics from Chapter Work Energy and Power for Practice Test. After submission, get instant results with correct answers and detailed explanations. This is Quiz 3 of the series.

21. What does the area under a force-displacement graph represent?



22. What is the formula for efficiency?



23. Can a machine have 100% efficiency?



24. KE is proportional to what power of speed?



25. If speed doubles, what happens to KE?



26. What are the units of spring constant?



27. Max height of 2 kg ball thrown at 10 m/s (g=10)?



28. Work to accelerate 1000 kg car from 10 to 20 m/s?



29. Spring constant when 20 N stretches 0.5 m?



30. Power of 50 kg person climbing 10 m in 20 s?



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Instructions: Select one answer per question. After submitting, you will see your score, correct answers, and explanations.

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