일반물리학 1 — Force and Motion-I: Problem 34

34 In Fig. 5-30, a crate of mass $m = 115 \text{ kg}$ is pushed at constant speed up a frictionless ramp ($\theta = 30.0^\circ$) by a horizontal force $\vec{F}$. What are the magnitudes of (a) $\vec{F}$ and (b) the force on the crate from the ramp?