1. From the top of a tall building, you throw one ball straight up withspeed and one ball straight down with speed. a. Which ball has the greater speed when it reaches the ground? Justify. b. Which ball gets to the ground first? Justify. c. Which ball has a greater displacement when it reaches the ground? Justify. d. Which ball has traveled the greater distance when it hits the ground? Justify. 2. A subway train starts from rest at a station and accelerates at a rate of 1.60 m/s2 for 14.0 s. It runs at constant speed for 70.0 s and slows down at a rate of 3.50 m/s2 until it stops at the next station. Find the total distance covered. 3. A person takes a trip, driving with a constant speed of 89.5 km/h, except for a 22.0-min rest stop. If the person's average speed is 77.8 km/h, (a) how much time is spent on the trip and (b) how far does the person travel? 4. A ball of moist clay falls 15.0 m to the ground. It is in contact with the ground for 20.0 ms before stopping. (a) What is the magnitude of the average acceleration of the ball during the time it is in contact with the ground? (Treat the ball as a particle.) (b) Is the average acceleration up or down? 5. Draw and describe the position-time graph, velocity-time graph and acceleration-time graph of the following condition: a. Particle in motion with constant acceleration b. Particle in motion with constant velocity