Es a boy pulls on a rope attached to a cart with wheels. should he include the friction in the wheel bearings when making a free
body diagram of the forces on the cart?
a)
yes, a free body diagram shows all the forces acting on a system.
yes, the friction in the wheel bearings plays a vital role in motion
iminate
no, the friction in the bearings is an internal force and should not be
considered
no, the friction in the bearings is balanced by that between the wheels and
the surface
submit
motion
(sp2.b) free body diagram
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