A particle is moving along a circular path of radius 5m with uniform speed 5m/s. What will be the average acceleration when the particle completes half revolution???
1 Answer
Explanation:
The magnitude of acceleration is given by
Acceleration is a vector so we need to take account of its direction. We know it is always acting towards the centre of the circle. The diagram above shows it at various stages in the half revolution.
As for all vectors, we can break the acceleration down into horizontal and vertical components. By looking at the diagram, we can see that vertical components will cancel each other out in a half revolution
.
The horizontal component of the black acceleration vector is
In a half revolution (anticlockwise)
This is in the horizontal direction (left to right on the diagram)