Question

State which of the following situations are possible and give an example for each of these:

1. an object with a constant acceleration but with zero velocity
2. an object moving with an acceleration but with uniform speed.
3. an object moving in a certain direction with an acceleration in the perpendicular direction.

Answer 1

(a) Possible.
When a ball is thrown up at maximum height, it has zero velocity, although it will have constant acceleration due to gravity, which is equal to $9.8$ $m/s^2$.

---

(b) Possible.
When a car is moving in a circular track, its acceleration is perpendicular to its direction.

---

(c) Possible.
A car is moving in a circular track, its acceleration is perpendicular to the direction of motion.