Question

When you apply the brakes, the bicycle stops and the rim of the wheel becomes hot. explain the reason?

Answer 1

heya folk!! 

THIS IS BECAUSE OF THE FRICTION
because when there is more friction more heat is produced i.e rough surfaces eg; try rubbing your hands you'll get the answer

Answer 2

It occurs due to friction between the wheel and the surface.rim becomes hot because the wheel and the surface perform friction
I hope my answer helps you.