Work and Energy · Class 9 · CBSE Science
Which of the following units is equivalent to a Joule (J)?
Practice question from Work and Energy (Class 9 · CBSE Science), with the correct answer and a step-by-step solution.
easy · MCQ · Q-634B72
Which of the following units is equivalent to a Joule (J)?
- A.kg m s^-1
- B.kg m^2 s^-2Correct answer
- C.kg m s^-2
- D.kg^2 m s^-2
Solution
Work is force multiplied by displacement (). The unit of force is Newton (kg m s^-2) and displacement is in meters (m), so the unit of work/energy is kg m s^-2 m = kg m^2 s^-2, which is a Joule.
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