Which of the following is true about poles on magnets? A. North Pole attracts South Poles. B. North Pole repel South Poles. C. North Poles attracts north poles. D. Both B and C are true

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?