4 a. We are going to design a free fall ride in which our vehicle has a velocity of 33m/s once the vehicle reaches the bottom. Which equation would we use to figure out how tall our design must be? Gravity is 9.8 m/s^2

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?