write a big note on centripetal acceleration
Answers
Centripetal acceleration is the idea that any object moving in a circle will have an acceleration vector pointed towards the center of that circle. Centripetal means towards the center. Even an object moving at a constant speed around a circle won't have a constant velocity. This is because velocity is a vector.
ac=v2r a c = v 2 r , which is the acceleration of an object in a circle of radius r at a speed v. So, centripetal acceleration is greater at high speeds and in sharp curves (smaller radius), as you have noticed when driving a car.
Examples:
Anything in orbit.
A car turning a corner/going round a roundabout.
Place an object on something spinning.
A mass spinning on a string.
Rollercoaster doing a loop.
Clothes inside a washing machine.
A centripetal force can be provided by gravity (orbits) , the electric charge (electron orbits around a nucleus) or by a piece of string ( something being whirled arounds on a piece of string). So for circular motion there needs to be a force ( with some other cause) which is directed towards one point, the centre.
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