Q. No.1. \(2000~\text J\)
2. \(1000~\text J\)
3. -\(2000~\text J\)
4. -\(1000~\text J\)
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| 1. | his weight. |
| 2. | the normal reaction of the ladder on the man. |
| 3. | the reaction forces of the ground on the ladder. |
| 4. | the internal forces of the man. |
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1. \(200~\text J\)
2. \(-200~\text J\)
3. \(1000~\text J\)
4. \(-1000~\text J\)
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| Statement I: | When a ball is thrown vertically upward, it moves with a constant acceleration. |
| Statement II: | When a ball is thrown upward, its kinetic energy decreases linearly with time. |
| 1. | Statement I is incorrect and Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct and Statement II is incorrect. |
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(assume that the ball rebounds off a vertical surface and that the effect of gravity is negligible)
1. zero
2. \(50~\text{km/h}\)
3. \(100~\text{km/h}\)
4. \(150~\text{km/h}\)
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| Assertion (A): | In a swinging simple pendulum, the power delivered by gravity is maximum when the pendulum is at the lowest point. |
| Reason (R): | The speed of the pendulum bob is highest when it reaches the lowest point and the power is given by \((\vec F.\vec v).\) |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
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| 1. | is positive |
| 2. | is negative |
| 3. | is zero |
| 4. | can be positive, negative or zero depending on the man's acceleration. |
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| 1. | \(mg\sqrt{gL}\) | 2. | \(\Large\frac{mg\sqrt{gL}}{2}\) |
| 3. | \(\Large\frac{mg\sqrt{gL}}{4}\) | 4. | \(\Large\frac{mg\sqrt{gL}}{2\sqrt2}\) |
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| 1. | zero | 2. | \(mgh\) |
| 3. | \(\Large\frac{mgh}{2}\) | 4. | \(2mgh\) |
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Given below are two statements:
| Assertion (A): | The net work done by gravity is equal to the loss in the vertical component of the kinetic energy for a projectile. |
| Reason (R): | The work-energy theorem applies to all systems including projectiles. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
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