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A MATH180: HW08-..
Winter 2021 PHYS 231 03
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Problem 9.30
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4
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A horizontal spring with spring constant 85 N/m
extends outward from a wall just above floor level.
A 9.5 kg box sliding across a frictionless floor hits
the end of the spring and compresses it 3.5 cm
before the spring expands and shoots the box back
out. How fast was the box going when it hit the
spring?
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How fast was the box going when it hit the spring?
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