1.A stone is thrown vertically upward with a speed of 11.0 m/s from the edge of a cliff 79.0 m high (Fig. 2-32). (a) How much later does it reach the bottom of the cliff? (b) What is its speed just before hitting? (c) What total distance did it travel? 2.If a car rolls gently (v0 = 0) off a vertical cliff, how long does it take it to reach 74 km/h? 3.A sports car accelerates from rest to 99 km/h in 6.2 s. What is its average acceleration in m/s2?