1. | constant acceleration |
2. | constant velocity but varying acceleration |
3. | varying velocity and varying acceleration |
4. | constant velocity |
1. | \(24 :1\) | 2. | \(1:720\) |
3. | \(1:60\) | 4. | \(2:5\) |
1. | \(3000~\text{m}\) | 2. | \(2800~\text{m}\) |
3. | \(2000~\text{m}\) | 4. | \(1000~\text{m}\) |
1. | \(20\) | 2. | \(10\sqrt3\) |
3. | zero | 4. | \(10\) |
1. | \(\vec v\) is a constant; \(\vec a\) is not a constant. |
2. | \(\vec v\) is not a constant; \(\vec a\) is not a constant. |
3. | \(\vec v\) is a constant; \(\vec a\) is a constant. |
4. | \(\vec v\) is not a constant; \(\vec a\) is a constant. |
Rain is falling vertically downward with a speed of \(35~\text{m/s}.\) The wind starts blowing after some time with a speed of \(12~\text{m/s}\) in the east to the west direction. The direction in which a boy standing at the place should hold his umbrella is:
1. | \(\text{tan}^{-1}\Big(\frac{12}{37}\Big)\) with respect to rain |
2. | \(\text{tan}^{-1}\Big(\frac{12}{37}\Big)\) with respect to wind |
3. | \(\text{tan}^{-1}\Big(\frac{12}{35}\Big)\) with respect to rain |
4. | \(\text{tan}^{-1}\Big(\frac{12}{35}\Big)\) with respect to wind |
A car starts from rest and accelerates at \(5~\text{m/s}^{2}.\) At \(t=4~\text{s}\), a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at \(t=6~\text{s}?\)
(Take \(g=10~\text{m/s}^2\))
1. \(20\sqrt{2}~\text{m/s}, 0~\text{m/s}^2\)
2. \(20\sqrt{2}~\text{m/s}, 10~\text{m/s}^2\)
3. \(20~\text{m/s}, 5~\text{m/s}^2\)
4. \(20~\text{m/s}, 0~\text{m/s}^2\)