The figure below shows a crate with a mass of m = 2.95 kg on a
surface inclined at an angle of 35.0°. The coefficient of static
friction between the crate and the surface is 0.280. Find the
minimum magnitude of the force F (in N), applied to the crate in a
direction perpendicular to the surface, that will prevent the crate
from sliding down the surface. A rectangular crate of mass m is
positioned on an inclined surface of angle 35.0° (measured
counterclockwise from the horizontal). A force, vector F, is
applied down and right on the crate, perpendicular to the
incline.