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In a ballistic pendulum, a 1.25-g bullet is shot straight into and becomes stuck in a...

In a ballistic pendulum, a 1.25-g bullet is shot straight into and becomes stuck in a 5.00-kg wood block which is hanging from a 1.4 m long string. This causes the block to swing up to an angle of 2.5°. What was the speed of the bullet just before it hit the block?

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