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Q1. A 10.60 weather rocket generates a thrust of 220. The rocket, pointing upward, is clamped to the top of the vertical spring. The bottom of the spring, whose spring constant is 450, is anchored to the ground.
Q2. A 12 g bullet travelling 227 m/s penetrates a 2.00 kg block of wood and emerges cleanly at 164 m/s. If the block is stationary on the frictionless surface when hit, how fast does it move after the bullet emerges?
The mass per unit length of the cord is 1.24 e-2 kg/m, so the mass of the cord is negligible compared to the mass of block. The cord is being vibrated at a frequency of 167 Hz (vibration source not shown in the drawing).
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