@shayanreloaded bike physics
|dw:1344703864992:dw|the back tire pushes trying to move clockwise, and static friction's reactive force pushes to the right the wheel in the from is being pushed by a force of friction to the left (due to the relative motion of the ground, as you said) which also causes the tire to move clockwise I misspoke to say that static the friction has no direction in this case, that's why I needed to draw it
wheel in the front*
so will the back tire continue to rotate clockwise even when friction pushes it to the right/forward??
we force the tire to move clockwise by turning the pedals. the force acting to the left is the reactive force of friction of the ground on the tire hence the friction on the back tire is a result of us *forcing* the tire to move clockwise, so yes the wheel will move that way
at the bottom of the tire we have a balance of forces|dw:1344704471674:dw|this is the force that the tire exerts on the ground due to our pedaling (human power) since there is not slippage of the back wheel this force must be balanced by friction\[\vec F=-\vec f\]hence friction points forward, which causes the bike to move forward
|dw:1344704602174:dw|
Join our real-time social learning platform and learn together with your friends!