15. [1/2 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYS2016 5.1.WA.009. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) When rebuilding her car's engine, a physics major must exert 250 N of force to insert a dry steel piston into a steel cylinder at a constant velocity. What is the normal force in newtons between the piston and cylinder? (Assume the coefficient of kinetic friction is 0.3.) 833.33 N (b) What force (in N) would she have to exert if the steel parts are oiled, so that the coefficient of friction is 0.03? 8333.33 x What is the equation describing the dependence of the normal force on friction force? N Additional Materials Reading