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Collision and Friction Multiple Questions and Answers.
| 6. | Calculate the velocity of the bob of a simple pendulum at its mean position if it is able to rise to a vertical height of 10cm. Take g = 9.8m/s2? | ||
| A. | 5m/s | ||
| B. | 1.5m/s | ||
| C. | 14m/s | ||
| D. | 1.4m/s | ||
| 7. | How high must the body be lifted to gain an amount of potential energy equal to the kinetic energy it has when moving at a speed of 20m/s? g=9.8m/s2? | ||
| A. | 20m | ||
| B. | 20.0m | ||
| C. | 202m | ||
| D. | 22m | ||
| 8. | A ball is thrown vertically upwards with a velocity of 20m/s. At what height, will its kinetic energy be half its original value? | ||
| A. | 10.20m | ||
| B. | 10m | ||
| C. | 15m | ||
| D. | 5m | ||
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