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Solution: The ballistic pendulum is a system used to measure the speed of a fast-moving projectile, such as a bullet. The bullet is fired into a large block of wood suspended from some light wires. The bullet embeds in the block, and the entire system swings through a height h since the collision is perfectly inelastic. Suppose that h = 5.0 cm, m1 = 0.5 g, and m2 = 1 kg. Find the initial speed of the bullet.

Problem

The ballistic pendulum is a system used to measure the speed of a fast-moving projectile, such as a bullet. The bullet is fired into a large block of wood suspended from some light wires. The bullet embeds in the block, and the entire system swings through a height h since the collision is perfectly inelastic. Suppose that h = 5.0 cm, m1 = 0.5 g, and m2 = 1 kg. Find the initial speed of the bullet.