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What force between a bicycle's tires and the road affects the speed of the bicycle?
Wiki User
∙ 7y ago
Answer:
When a bicycle is moving upward a force is acting called friction which pulls the rider backward making it harder for the rider to move forward. When the rider is at a constant speed the forces are balanced (the same), when the bicycle is speeding up(accelerating) the forces are unbalanced.The force acting forward is greater. When the bicycle is slowing down the forces going upward and downward are the same, however the force acting backward is greater. The forces are unbalanced when slowing down. When at rest the forces are also balanced. So, overall , the only times when the force's are balanced is when they are either at a constant speed or at rest. The times when the forces that are unbalanced are when the bicycle is slowing down or speeding up.Generally, it is gravity that holds you down, some wind resistance depending on the clothing you wear (as baggy clothes can increase drag) this is why professional cyclists wear those dodgy suits.Rick Satterfield
Wiki User
∙ 7y agoThe answer is friction!
You have two forces that act between the bicycle and the road. First there's friction.
With zero friction the bike would never get moving, it'd be left with the wheel spinning in the same place, or topple over.
As the wheel will roll along there can't really be too much friction between tire and road, unless the the tire actually sticks to the surface.
The next is gravity, pulling the bike against the surface. This pressure will cause the bicycle tire to deform. The more the wheel has to deform under the weight of the rider, the more energy will be lost in squashing the wheel as the bike rolls along.
it is actually friction......
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