A man driving a scooter at \(15~\text{m/s}\) brakes at the rate of \(2~\text{m/s}^2\). His speed, after \(10~\text{s}\) after the application of brakes will be:
1. \(5~\text{m/s}\)
2. \(-5~\text{m/s}\)
3. \(0~\text{m/s}\)
4. \(10~\text{m/s}\)
A boy throws a ball straight up the side of a building and receives it after \(4~\text s.\) On the other hand, if he throws it so that it strikes a ledge on its way up, it returns to him after \(3~\text s.\) The ledge is at a distance \(d\) below the highest point, where \(d=? \) (take acceleration due to gravity, \(g=10~\text{ms}^{-2})\)
1. \(5~\text m\)
2. \(2.5~\text m\)
3. \(1.25~\text m\)
4. \(10~\text m\)
1. | \(H\) | is less than
2. | \(H\) | is greater than
3. | \(H\) | is equal to
4. | cannot be related with \(H\) |
1. | \(A\) is always ahead of \(B.\) |
2. | \(B\) is always ahead of \(A.\) |
3. | \(A\) is initially ahead, but \(B\) overtakes it. |
4. | \(B\) is initially it ahead, but \(A\) overtakes it. |
1. | distance travelled | 2. | time travelled |
3. | average velocity | 4. | average speed |
1. | \(s=ut+{\Large\frac12}at^2\) |
2. | \(s=ut-{\Large\frac12}at^2\) |
3. | \(s={\Large\frac12}at^2-ut\) |
4. | none of the above holds |