14) An object is launched from the ground with an initial velocity and angle such that the maximum height achieved is equal to the total range of the projectile. The tangent of the launch angle is? a) 1 b) 2 c) 3 d) 4 e) 5 15) A ball moving horizontally at 3 m/s rolls off the top of a flight of stairs. If each stair is 0.5m high and 0,5m wide, which stair will the ball hit? Hint: drawing diagram may help. a) 1 st b ) 2nd c ) 3 rd d) 4th e) 5th 16) How long would it take a car, starting from rest and accelerating uniformly in a straight line at 5 m/s2 , to cover a distance of 200m? a) 5 b ) 7 c ) 9 d) 11 e) 13 17) A rock is dropped off a cliff and strikes the ground with a speed of 30 m/s. How high was the cliff? a) 15.2 b) 30.4 c) 45.6 d) 60.8 18) A stone is thrown horizontally with an initial speed of 10 m/s from a bridge. How long will it take the stone to strike water 80 m below the bridge? a) 1 b) 2 c) 3 d) 4 e) 5