What is the potential energy for the child

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Q. What is the potential energy for the child just as she is released, compared with the potential energy at the bottom of the swing?

Q. A rifle with a barrel length of 65 fires a 12 bullet with a horizontal speed of 370 . The bullet strikes a block of wood and penetrates to a depth of 10 . What resistive force (assumed to be constant) does the wood exert on the bullet? How long does it take the bullet to come to rest?

Reference no: EM1361581

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