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Collision and Friction Multiple Questions and Answers.
| 1. | When force and displacement are in the same direction, the kinetic energy of the body? | ||
| A. | Increases | ||
| B. | Decreases | ||
| C. | Remains constant | ||
| D. | Becomes zero | ||
| 2. | The momentum of a body of mass 5kg is 500kgm/s. Find its kinetic energy? | ||
| A. | 2×105 J | ||
| B. | 2.5×104 J | ||
| C. | 2.5×105 J | ||
| D. | 2.5J | ||
| 3. | A bullet of mass 20g is found to pass two points 30m apart in a time interval of 4s. Calculate the kinetic energy of the bullet if it moves with constant speed. | ||
| A. | 2.5J | ||
| B. | 5J | ||
| C. | 0.562J | ||
| D. | 2J | ||
| 4. | What energy does a stretched bow posses? | ||
| A. | Kinetic energy | ||
| B. | Gravitational energy | ||
| C. | Elastic potential energy | ||
| D. | Potential energy | ||
| 5. | Which of the following is not a conservative force? | ||
| A. | Elastic force | ||
| B. | Gravitational force | ||
| C. | Force of friction | ||
| D. | Electrostatic force | ||
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