A 23 bullet traveling 240 penetrates a 4 block of wood, Ask an Expert

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Q. A performer, seated on a trapeze, is swinging back and forth with a period of 8.85 s. If she stands up, thus raising the center of mass of the trapeze + performer system by 30.0 cm, what will be the new period of the system? Treat trapeze + performer as a simple pendulum.

Q. A 23- bullet traveling 240 penetrates a 4.0- block of wood and emerges going 170. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?

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