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Motion in a Plane :: Discussion
| 5. | . A body is projected horizontally from the top of a cliff with a velocity of 9.8m/s. What time elapses before horizontal and vertical velocities become equal? Take g = 9.8m/s2? | |
| A. | 9.8s | |
| B. | 0s | |
| C. | 10s | |
| D. | 1s | |
| Answer: Option D | |
| Explanation: | |
|
Horizontal velocity at any instant, vx = u = 9.8m/s Vertical velocity at any instant, vy = 0 + gt = 9.8t 9.8 = 9.8t t = 1s. |
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