1. The problem statement, all variables and given/known data Two astronauts are unloading scientific equipment from the space ship that has just landed on the Moon surface. To prevent a box from sliding down an inclined ramp, astronaut A pushes on the box in the direction parallel to the incline, just hard enough to hold the box stationary. In an identical situation astronaut B pushes on the box horizontally. Regard as known the mass m of the box, the coefficient of static friction s between box and incline, and the inclination angle . (a) Determine the force A has to exert. (b) Determine the force B has to exert. (c) If m = 2.00 kg, = 25.0°, and s = 0.160, who has the easier job? (d) What if s = 0.380? Whose job is easier? The acceleration of gravity on the Moon is 1.625 m/s2. 2. Relevant equations fstatic= coefficient of friction * normal force 3. The attempt at a solution For A, the applied force is on the x plane so the forces in play are the applied force, the static friction force, and the x component of the normal force/mg. Both the static friction force and applied force are working against gravitational force to keep the box in place and there is no movement, so mg*sin theta = applied force + static friction force so the applied force= mg*sin theta - (coefficient of friction)(gravitational constant)?? I don't know how to tackle B though, since the applied force is neither parallel nor perpendicular to the incline.