The ballistic pendulum is a device to measure the speed of a bullet using conservation of energy and momentum. A 20 g bullet is fired horizontally into a 1.1 kg wood block hanging from a 1.2-m-long string. The bullet embeds tself into the block, and the block then swings out to an angle of 35°. A. How high does the block of wood go relative to its initial height when its hanging straight down? B. What is the increase in gravitational potential energy of the wood block at its maximum height? C. Use conservation of energy to determine the speed of the block just after the bullet strikes it. D. Use conservation of momentum to determine the speed of the bullet right before it strikes the block.

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Chapter1: Units, Trigonometry. And Vectors
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The ballistic pendulum is a device to measure the speed of a bullet using conservation of energy and momentum.
A 20 g bullet is fired horizontally into a 1.1 kg wood block hanging from a 1.2-m-long string. The bullet embeds
itself into the block, and the block then swings out to an angle of 35°.
A. How high does the block of wood go relative to its initial height when its hanging straight down?
B. What is the increase in gravitational potential energy of the wood block at its maximum height?
C. Use conservation of energy to determine the speed of the block just after the bullet strikes it.
D. Use conservation of momentum to determine the speed of the bullet right before it strikes the block.
Transcribed Image Text:The ballistic pendulum is a device to measure the speed of a bullet using conservation of energy and momentum. A 20 g bullet is fired horizontally into a 1.1 kg wood block hanging from a 1.2-m-long string. The bullet embeds itself into the block, and the block then swings out to an angle of 35°. A. How high does the block of wood go relative to its initial height when its hanging straight down? B. What is the increase in gravitational potential energy of the wood block at its maximum height? C. Use conservation of energy to determine the speed of the block just after the bullet strikes it. D. Use conservation of momentum to determine the speed of the bullet right before it strikes the block.
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