A m = 1.9 kg wood box slides down a vertical wood wall while you push on it at a = 48° angle.?

Question

A m = 1.9 kg wood box slides down a vertical wood wall while you push on it at a = 48° angle. What magnitude of force should you apply to cause the box to slide down at a constant speed?
N

Answer 1

Sum of forces must be equal to zero
Assuming no friction
W - F sin(48)=0 since W=mg
mg= F sin(48)
F=mg/sin(48)=
F=1.9 x 9.81 / sin(48) = 25N