1) A 0.400 kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.800 m/s when it makes a head-on collision with a stationary 0.200 kg glider.
(a) If the glider continues on with a speed of 0.300 m/s, what is the speed of the second glider?
(b) Is this collision elsatic?