일반물리학 1 — Force and Motion-II: Problem 16

16 In Fig. 6-22, a small block of mass m is sent sliding with velocity v along a slab of mass 10m, starting at a distance of l from the far end of the slab. The coefficient of kinetic friction between the slab and the floor is \(\mu_1\); that between the block and the slab is \(\mu_2\), with \(\mu_2 > 11\mu_1\). (a) Find the minimum value of v such that the block reaches the far end of the slab. (b) For that value of v, how long does the block take to reach the far end?