Question

.P20 Suppose that you are navigating a spacecraft far from other objects. The mass of the spacecraft is 1.5 x 10 kg (about 150 tons). The rocket engines are shut off, and you're coasting along with a constant velocity of (0,20,0) km/s. As you pass the location (12,15,0) km you briefly fire side-thruster rockets, so that your spacecraft experiences a net force of (6 x 10,0,0) N for 20 s. After turning off the thrusters, you then continue coasting with the rocket engines turned off. (The ejected gases have a mass that is very small compared to the mass of the spacecraft.) (a) Using a step size of 20 seconds, predict where you will be 40 s after you began firing the thrusters. (Note that for the second step the thrusters are off.) (b) Where would you have been if you had not fired the thrusters?

Answer 1

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