If the acceleration of the particle is constant in magnitude but not in direction, what type of path does the particle follow ?

$(a)$ Differentiate acceleration from velocity.

$(b)$ Can a body have acceleration without change in magnitude of velocity ? Explain with an example.

$(c)$ A motor boat starting from rest on a lake accelerates in a straight line at a constant rate of $3\, m s ^{-2}$ for $8 \,s$. How far does the boat travel during this time ?

A body can have zero average velocity but not zero average speed. Justify giving an example.

Write true or false for the following statements

Motion along a curved line is called translatory or rectilinear motion.

Two graphs for motion of objects moving along a straight line are shown. State how the speed is changing with time in both cases.