Question

how will you find av. velocity if acceleration (a)is uniform (b)is non-uniform.

Answer 1

(a) If acceleration is uniform, then the average velocity is given by the arithmetic mean of the initial velocity and final velocity for a given period of time.
Average velocity=u+v/2
(b) If acceleration is non-uniform, then ​average velocity is not equal to the average of the initial and final velocities. The average velocity must be calculated from:
$$\begin{gathered} \mathrm{Average}\mathrm{velocity}=\frac{\mathrm{x}\left(\mathrm{t}\right)-\mathrm{x}\left(0\right)}{\mathrm{t}} \\ \mathrm{where}, \\ \mathrm{x}\left(\mathrm{t}\right)=\mathrm{Final}\mathrm{position} \\ \mathrm{x}\left(0\right)=\mathrm{Initial}\mathrm{position} \\ \mathrm{t}=\mathrm{Time}\mathrm{taken} \end{gathered}$$