If a particle moves with velocity $v\left(t\right)=(2t^2-t)m/s$, then find the velocity (in $m/s$) of particle at $t=3s$.

Q. If a particle moves with velocity $v\left(t\right)=2t^2-tm/s$, then find the velocity ($m/s$) of particle at $t=3s$.

Q. A particle $A$ is moving with a speed of $20\text{m/s}$ towards right and another particle $B$ is moving at a speed of $5\text{m/s}$ towards right. Find their velocity of approach.

Q. A particle moves according to the equation $x=2t^2-5t+6$ where, $x$ is in $\text{m}$. Find
$\left(i\right)$ average velocity in the first $3\text{s}$, and
$\left(ii\right)$ instantaneous velocity at $t=3\text{s}$.

Q. A particle moves along the sides $AB,BC,$ and $CD$ of a square of side $25\text{m}$ shown in the figure with a speed of $15\text{m/s}$. The magnitude of average velocity of the particle is

Q. If velocity of a particle is $v\left(t\right)=(5t-10)\text{m/s}$, the average speed and magnitude of average velocity of the particle in $4\text{sec}$ respectively are