A5.5 kg object moving in the +x direction at 5.5 m/s collides head-on with a 2.8 kg object moving in the -x direction at 4.0 m/s. find the final velocity of each mass for each of the following situations. (take the positive direction to be +x.)
(a) the bodies stick together.
/s (5.5 kg mass)
/s (2.8 kg mass)
(b) the collision is elastic.
/s (5.5 kg mass)
/s (2.8 kg mass)
(c) the 5.5 kg body is at rest after the collision.
/s (5.5 kg mass)
/s (2.8 kg mass)
(d) the 2.8 kg body is at rest after the collision.
/s (5.5 kg mass)
/s (2.8 kg mass)
(e) the 5.5 kg body has a velocity of 4.0 m/s in the -x direction after the collision.
/s (5.5 kg mass)
/s(2.8 kg mass)
are the results in (c), (d), and (e) "reasonable"? explain.

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.