PhysicsLAB AP Free Response Question
2002 B1

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A model rocket of mass 0.250 kg is launched vertically with an engine that is ignited at time t = 0, as shown above. The engine provides an impulse of 20.0 N•s by firing for 2.0 s. Upon reaching its maximum height, the rocket deploys a parachute, and then descends vertically to the ground.
(a) On the figures below, draw and label a free-body diagram for the rocket during each of the following intervals.



 (b) Determine the magnitude of the average acceleration of the rocket during the 2 s firing of the engine.

 (c) What maximum height will the rocket reach?

 (d) At what time after t = 0 will the maximum height be reached?

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