Physics
When you apply the brakes, a bicycle stops and the rims of its wheels become hot. Explain the reason.
Answer
When we apply the brakes on a bicycle, the brake pads press tightly against the rims of the wheels. This contact creates friction, which is the force that opposes the motion of the rotating wheels.
Friction is the force that opposes motion. It slows down the wheels and eventually stops the bicycle. But when friction acts, it also produces heat. That is why the rims become hot after braking.
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