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 \(9.8\) \(m/s^2\).

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

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