Two students are on a balcony a distance h above the street. The first student throws a ball vertically downward at a speed vo; at the time, the second student throws a ball vertically upward at the same speed. Answer the following symbolically in terms of Vo, 9, h, and t. (a) Write the kinematic equation for the y-coordinate of each ball. (Let up be positive.) ball 1 1= ball 2 2= (b) Set the equations found in part (a) equal to height 0 and solve each for t symbolically using quadratic formula. What is the difference in the two balls' time in the air? (Remember that t must always be a positive quantity.) t2 - t1 : (c) Use the time-dependent kinematics equation to find the velocity of each ball as it strikes the ground. ball 1 ball 2 V2 = (d) How far apart are the balls at a time after they are released and before they strike the ground? Y2 - y 1 =