A glider of mass m1 slides on a frictionless track with initial velocity v1i = 2 m/s. It hits a stationary glider of mass m2. A spring attached to the first glider compresses and relaxes during the collision so that mechanical energy is conserved and the collision is elastic. The velocity of the center of mass of the system is VCM = 0.3 m/s.

How does m1 compare to m2?

(a) m1 > m2

(b) m1 = m2

(c) m1 < m2

What is the final velocity of the first glider after the collision?

(a) v1f = -0.6 m/s

(b) v1f = -1.2 m/s

(c) v1f = -1.4 m/s

(d) v1f = -1.6 m/s

(e) v1f = -2.0 m/s