In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is 1.10 m. The mug slides off the counter and strikes the floor 0.40 m from the base of the counter.(a) With what velocity did the mug leave the counter? m/s (b) What was the direction of the mug's velocity just before it hit the floor? (below the horizontal)