Acceleration versus velocity graph of a particle moving in a straight line starting from  rest is as shown in figure. The corresponding velocity-time graph would be

The positions of two cars $A$ and $B$ are $X_A = at + bt^2,$ $X_B = ft -t^2$ At what time Both cars will have same velocity

If a freely falling body travels in the last second a distance equal to the distance travelled by it in the first three second, the time of the travel is........$sec$

A parachutist drops freely from an aeroplane for $10\,s$ before the parachute opens  out. Then he descends with a net retardation of $2.5\, m/s^2$. If he bails out of the  plane at a height of $2495\, m$ and $g = 10\, m/s^2$, hit velocity on reaching the  ground will be .......$m/s$

A body travels for $15\, sec$ starting from rest with constant acceleration. If it travels distances ${S_1},\;{S_2}$ and ${S_3}$ in the first five seconds, second five seconds and next five seconds respectively the relation between ${S_1},\;{S_2}$ and ${S_3}$ is

The two ends of a train moving with constant acceleration pass a certain point with velocities $u$ and $3 u$. The velocity with which the middle point of the train passes the same point is ........... $u$