posted by COFFEE .
A bicyclist travels in a circle of radius 35.0 m at a constant speed of 7.00 m/s. The bicycle-rider mass is 72.0 kg.
Calculate the magnitude of the force of friction on the bicycle from the road.
Calculate the magnitude of the net force on the bicycle from the road.
I figured this one out too but I still can't get the other one about the string :/