Respuesta :
The component of the weight of the box perpendicular to the incline is mg cos 12. = 335.5 N. The normal reaction force acting on the box is 335.5- 78.2 = 257.3 N.
Answer:
See below
Explanation:
You will need to know the mass of the box......you did not give it in your post.
Part of the 185 N will decrease the normal force ....this will decrease the frictional forces. Part of the 185 N will act up the incline....this force less the frictional forces will accelerate the box up the incline according to
F = ma....but mass is not given.
