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Friction and rolling resistance, and work done queries

by sgstudent
Tags: rolling, work energy theorem
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tiny-tim
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Jan4-13, 05:00 PM
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hi sgstudent! happy new year!
Quote Quote by sgstudent View Post
Oh but since the friction acting on the wheels by the ground is also static friction, then shouldn't there be a push force that is equal to the friction on the ground? What would that push force be and since the push force is equal to the static friction on the wheel how can there be a net force?
no, the push force P on the top of the wheel is forward

and the friction F from the ground is also forward
for example, if there is a horizontal wind resistance force of W, and if the acceleration is zero,

then P = F (because the angular acceleration is zero), and so P = W/2


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