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Work, Energy and Power :: Discussion
| 4. | A gardener pushes a lawn roller through a distance of 20m. If he applies a force of 20kg weight in a direction inclined at 60° to the ground, find the work done by him. (g=9.8m/s2)? | |
| A. | 400J | |
| B. | 1960J | |
| C. | 250J | |
| D. | 2514J | |
| Answer: Option B | |
| Explanation: | |
|
F = 20kg wt = 20×9.8N |
|
| Tutorial Link: |
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