5: Two masses, 4 kg and 9 kg respectively, are attached to opposite ends of an ideal spring. The system sits on a frictionless table. If I push the masses together (against the spring) and release the
system, then I find the 4 kg mass has a speed of 3 m/s
A:
What is the speed of the 9 kg mass after release?
B:
What was the amount of energy stored in the spring before release?
C:
Suppose repeat this experiment on a table with friction.
Would the momentum be conserved
why or why not?
Would the energy of the system be conserved why or why not?