018 10.0 points During a baseball game, a batter hits a high pop-up. If the ball remains in the air for 5.47 s, how high above the point where it hits the bat does it rise? Assume when it hits the ground it hits at exactly the level of the bat. The acceleration of gravity is 9.8 m/s. Answer in units of m. 019 10.0 points An engineer in a locomotive sees a car stuck on the track at a railroad crossing in front of the train. When the engineer first sees the car, the locomotive is 400 m from the crossing and its speed is 23 m/s. If the engineer's reaction time is 0.61 s, what should be the magnitude of the mini- mum deceleration to avoid an accident? Answer in units of m/s-. 020 (part 1 of 3) 10.0 points A tennis ball is dropped from 1.21 m above the ground. It rebounds to a height of 1.05 m. With what velocity does it hit the ground? The acceleration of gravity is 9.8 m/s . (Let down be negative.) Answer in units of m/s. 021 (part 2 of 3) 10.0 points With what velocity does it leave the ground? Answer in units of m/s. 022 (part 3 of 3) 10.0 points If the tennis ball were in contact with the ground for 0.0127 s, find the acceleration given to the tennis ball by the ground. Answer in units of m/s