A 5.200×10 5
kg rocket is launched straight up. (a) If the magnitude of the thrust is 1.400×10 7
N and the air resistance is 4.510×10 6
N, calculate the magnitude of the net force on the rocket. F net
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= (b) What is the magnitude of the acceleration? a= m/s 2
(c) What is the apparent weight of a 85.0 kg astronaut during liftoff?