When a bicycle moves in the forward direction what is the direction of the frictional force in the rear and frontwheels

When a bicycle moves in the forward direction what is the direction of

1.	When a bicycle moves in the forward direction what is the direction of the frictional force in the rear and frontwheels
Answer» Solution :Whenwe pedala bicyclewe tryto PUSH the surfacebeackwardand thevelocityof point ofcontactin therearwheelis backwards. So thefrictionalforcepushes the rearwheelto moveforward .ifthe wheelslipsthenkineticfrictioncomesintoeffect. In ADDITION to staticfriction, therolling FRICTION alsoon bothwheelsinthe backwards DIRECTION .