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due to force of friction
gravity
Friction causes the bike to slow down.
because the muscles in your arms pulling on the handle bars causes an equal and opposite reaction from the bars acting on your arms in a direction toward the bike. this force counteracts some of the upward force from the equal and opposite reaction from the pedals due to you pushing down with your feet. in other words, it allows you to counter some of the force by involving muscle from your arm in the force to hold you down to the bike
inertia
That is called friction.
Well, the lever will apply a force to a linkage, connecting the lever to the actual brake. Then the force will travel through the linkage, down to the brake. In the brake, the force will be used to pinch a moving surface between two stationary surfaces, and the friction generated there will slow the bike down.
friction
There are several force transitions going on in the linkage, but in the actual brake you are using friction to turn speed into heat.The most important one is friction, but apart from that there's a lot of mucking about with mechanics in order to translate the motion by the hand at the lever into something capable of slowing down a wheel.There are several forces needed to make a bicycle brake work IRL. But I assume the one you're asking about is FRICTION.
gravityGRAVITY
What the brake lever does is that it use the action of the rider pulling on the lever into a force that can be used to slow the wheel(s) down by generating friction.
due to force of friction
Yes, applying the brakes on a bicycle should slow it down. Little squares of rubber are pressed to the metal rimming on the bicylce's wheel when you pull a handle brake, or pedal backwards (depends on if it's an adult bike or children's bike).
gravity
Pushing down on the pedal will cause the bike to move forward.
gravity force
Friction.