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Q. A 3.2 kg block of wood sits on a table. A 3.0 g bullet, fired horizontally at a speed of 490 m/s, goes completely through the block, emerging at a speed of 250 m/s. What is the speed of the block immediately after the bullet exits?

Q. A 550 kg cannon fires a 9 kg cannonball with a speed of 200 m/s relative to the muzzle. The cannon is on wheels that roll without friction. When the cannon fires, what is the speed of the cannonball relative to the earth?

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