일반물리학 1 — Force and Motion-II: Problem 11

11 A 68 kg crate is dragged across a floor by pulling on a rope attached to the crate and inclined 15° above the horizontal. (a) If the coefficient of static friction is 0.65, what minimum force magnitude is required from the rope to start the crate moving? (b) If \(\mu_k = 0.35\), what is the magnitude of the initial acceleration of the crate?