At location A, a 46.0-kg sledder has a height of 40.0 m above the bottom of the hill and a speed of 15.0 m/s. While coasting to location B at a height of 18.0 m, 1140
J of mechanical energy are dissipated. Another 1720 J of mechanical energy are
dissipated while moving from location B to C. Determine the missing potential
energy (PE) and kinetic energy (KE) values for locations A, B, and C and calculate
the speed at C. Use g = 9.8 N/kg.

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.