Question

A cyclist and her bicycle have a combined mass75.okg. If the frictional force acting
against the of the bicycle is -23.5, what
force must the cyclist apply to maintain a
constant velocity?

Answer 1

An equal and opposite force to the friction will maintain a constant velocity.

You left out a word between "the" and "of", and did not say what the units of force are. I assume they are Newtons.

The forward force is applied to the wheels by the road. The frictional force is partly aerodynamic drag.