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Rec13_172Fall11_rl

# Rec13_172Fall11_rl - Physics 172 Recitation 13 Fall 2011...

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Physics 172 – Recitation 13 Fall 2011 Purpose: The purpose of this recitation is to allow you to gain experience working with collisions and angular momentum. Readings: 11.1-11.9 General Instructions: Identify your system State which objects are interacting with the system State the fundamental principle(s) you use to solve the problems State the approximations and simplifying assumptions you use. State what quantities are conserved and not conserved. Note: You may find it useful to redefine your system for different parts of the problem. Problem 1: A rigid rod of mass M is initially at rest and hangs vertically in gravitational field of the Earth, as shown, on an axle through its center of mass. The length of the rod is l . A putty ball of mass m , strikes the lower end of the rod and sticks to it. Just before the collision the ball is moving horizontally at speed v . a)

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Rec13_172Fall11_rl - Physics 172 Recitation 13 Fall 2011...

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