A solid ball and a cylinder roll down an inclined plane. which reaches the bottom first? A. The ball reaches the bottom first.
B. The cylinder reaches the bottom first
C. They arrive at the bottom at the same time
D. It depends on the incline of the slope
E. It depends which of the two has the larger diameter​

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?