1. \(a\)
2. \(b\)
3. \(c\)
4. \(d\)
1. | \(2\) km | 2. | \(1\) km |
3. | \(\dfrac12\) km | 4. | \(\dfrac14\) km |
1. | zero | 2. | \(\dfrac{2u^2}{R}\) |
3. | \(\dfrac{u^2}{\sqrt2R}\) | 4. | \(\dfrac{\sqrt2u^2}{R}\) |
1. | \(10\) min | 2. | \(5\sqrt3\) min |
3. | \(20\) min | 4. | \(\dfrac{10}{\sqrt3}\) min |
1. | \(1000\) m | greater than
2. | \(1000\) m | less than
3. | \(1000\) m | equal to
4. | can be any of the above depending on the height of the cliff |
Statement I: | When a projectile is at its highest point, its tangential acceleration is zero. |
Statement II: | When a projectile is at the highest point of its trajectory, its speed is minimum. |
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. |
1. | conservative |
2. | non-conservative |
3. | neither conservative nor non-conservative |
4. | either conservative or non-conservative depending on whether the force is acting forward or backward |