_) In the gure, a crate of mass m = 83 kg is pushed at a constant speed up a frictionless ramp (9 = 29 ) by a horizontal force F . The positive direction of an xaxis is up the ramp, and the positive direction of a yaxis is perpendicular to the ramp. (a) What is the _) magnitude of F ? (b) What is the magnitude of the normal force on the crate? m. (a) Number n Units v (b) Number n Units v