In the figure, a crate of mass m = 79 kg is pushed at aconstant speed up a frictionless ramp (? = 31°) by a horizontalforce F . The positive direction of an x axis is up the ramp, andthe positive direction of a y axis is perpendicular to the ramp.(a) What is the magnitude of F ? (b) What is the magnitude of thenormal force on the crate?
