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?

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.