Motion in a circle - Higher
When a body moves in a circle, its direction is constantly changing. Since The speed of an object in a particular direction. is a vector quantity, having both a size and a direction, the velocity of the body must be changing even though its speed is constant.
As the velocity of a body in circular motion is changing, it must also be The rate of change in speed (or velocity) is measured in metres per second squared. Acceleration = change of velocity 梅 time taken.. The force responsible for this acceleration is called the Force, needed for circular motion, which acts towards the centre of a circle. and it acts radially inwards towards the centre of the circle.
For example, a car travelling on a roundabout will move at a constant speed, but with a changing velocity, as its direction is constantly changing. The centripetal force that acts inwards is due to the A force that opposes or prevents movement and converts kinetic energy into heat. between the car's tyres and the road. This force keeps the car moving in a circular path.