The weight of a body is 120N and it is lifted to a height of 10m, work done on the body is:
Correct answer: D. 1200 J
- A. 120 J
- B. 100 J
- C. 1000 J
- D. 1200 J
Explanation
The work done on an object when it is lifted can be calculated using the formula: Work = Weight x Height. In this case, the weight of the body is 120N and it is lifted to a height of 10m. Plugging in the values:Work = 120N x 10m = 1200 J.Thus, the correct answer is 1200 J. The other options are incorrect because:120 J: This underestimates the work done as it does not use the correct height.100 J: This is significantly lower than the calculated work.1000 J: While closer, it still fails to multiply the weight and height correctly.Therefore, the correct answer is 1200 J.
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About Work
Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
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