Exam3F06a

# Exam3F06a - 1. A bullet of mass mA=6.0 g traveling with an...

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A A1x 1. A bullet of mass m =6.0 g traveling with an initial speed of v =420 m/s collides with a pendulum bob that is initially at rest. The bullet passes through the bob, and emerges with a final speed of 60 B m/s. The cylindrical pendulum bob has radius R and mass m =1.6 kg, while the pendulum rod has negligible mass and length L=0.80 m from the pivot point to the center of the bob. For parts a) - c), the radius R is small, so that the bob acts like a point mass. a) Find the speed of the bob after the bullet has passed through, but before the angle of the pendulum has changed appreciably. 1.35 m/s b) To what maximum angle ( è ) does the pendulum swing before stopping momentarily? 27.9 0 c) How much mechanical energy is lost during this collision in part a)? 517 J d) Now assume that the pendulum bob is a solid disk with radius, R=0.40 m, that is not negligible. Find the total moment of inertia of the pendulum bob about the pivot point. 1.15 kg-m 2

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## This note was uploaded on 05/11/2008 for the course PHY 121 taught by Professor Chamberlin during the Spring '08 term at ASU.

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Exam3F06a - 1. A bullet of mass mA=6.0 g traveling with an...

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