6. (T) A high performance jet, mass 2450 kg, has twin jet engines. Each jet engine can develop 25 000 N of thrust. (a) What is the maximum acceleration the jet can sustain in a vertical climb? [4] (b) How long would it take the jet to reach Mach 3 in horizontal flight starting from 50 m/s? Ignore wind resistance and use the freezing point of water for the air temperature. [4] 7. What is the force of gravity acting on a 3500 kg satellite that orbits the Earth at an altitude of 3.0x105 m