PhysicsLAB: 2002 B1

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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