Question

State which of the following situations are possible and give an example for each of these:
a) An object with a constant acceleration but with zero velocity
b) An object moving with an acceleration but with uniform speed
c) An object moving in a certain direction with an acceleration in the perpendicular direction

Answer 1

Dear Student,
a) There is possibility where any object can have constant acceleration and zero velocity for a moment in the whole motion e.g. initially at rest in uniformly accelerated motion , object at highest point in projectile or vertical motion , etc. But for motion with constant acceleration and zero velocity for a interval is not possible .
b) if object is moving in uniform circular motion there is velocity v and acceleration equal to $\frac{v^2}{R}$ . So this motion is possible .
c) this type of motion is also possible since the velocity is tangential and acceleration is in normal direction .

Regards