If average velocity of particle moving on a straight line is zero in a time interval, then
Acceleration of particle may be zero
Velocity of particle must be zero at an instant
Velocity of particle may be never zero in the interval
Average speed of particle may be zero in the interval
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 ........... $u$
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
A frictionless wire $AB$ is fixed on a circle of radius $R$. A very small bead slips on this wire. Time taken by bead to slip from $A$ to $B$ is
Let $v$ and $a$ denote the velocity and acceleration respectively of a body