Between the two stations a train accelerates uniformly at first, then moves with constant velocity and finally retards uniformly. If the ratio of the time taken be $1 : 8 : 1$ and the maximum speed attained be $60\,km/h,$ then what is the average speed over the whole journey…….$km/h$

Position-time graph for a particle is shown in figure. Starting from $t=0$, at what time $t$ is ……… $s$, the average velocity is zero

Define velocity. Define average velocity.

An object moves with speed $v_1, v_2$, and $v_3$ along a line segment $A B, B C$ and $C D$ respectively as shown in figure. Where $AB = BC$ and $AD =3 AB$, then average speed of the object will be :

A body starts from rest and travels a distance $S$ with uniform acceleration, then moves uniformly a distance $2S$ and finally comes to rest after moving further $3S$ under uniform retardation. The ratio of the average velocity to maximum velocity is