1a A Spacecraft With A Mass Of 30 Tonnes Undergoes A Test After Repairs On A Control Rocket The Rocket Is Fired For 2 1 (69.46 KiB) Viewed 68 times
1a A Spacecraft With A Mass Of 30 Tonnes Undergoes A Test After Repairs On A Control Rocket The Rocket Is Fired For 2 2 (69.46 KiB) Viewed 68 times
1a) A spacecraft with a mass of 30 tonnes undergoes a test after repairs on a control rocket. The rocket is fired for 2.0 s and the resulting speed change is measured to be 0.02 m/s. Find the average thrust. (1 tonne is 1000 kg) [4 marks] 1b) A vehicle with a mass of 1520kg travelling at 30 m/s crashes into the rear of a 1780 kg vehicle travelling at 15 m/s. Estimate the velocities immediately after the collision using a coefficient of restitution estimate of 0.2. [5 marks] 1c) A rocket, having a total mass 20 tonnes, has just completed firing of its first stage. An explosive charge separates the first stage (now 12 tonnes) from the second, so that the speed of separation of the two parts is 4.2 m/s. What extra speed is imparted to the second stage? [4 marks] 1d) A 40 tonnes space craft docks with a 600 tonnes satellite, arriving at a speed of 0.30 m/s relative to the satellite. The two craft lock together on docking. Estimate the resulting change in speed of the satellite. Measure all speeds relative to the initial speed of the satellite. [4 marks]
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