A 15 kg object and a 18 kg object are connected by a massless compressed spring and
rest on a frictionless table. After the spring is
released, the object with the smaller mass has
a velocity of 12 m/s to the left.
What is the velocity of the object with the
larger mass?
Answer in units of m/s.
momentum is conserved
15 * 12 = 18 * v