ME 240: Introduction to Dynamics and Vibrations
Mechanical Engineering Department
The University of Michigan
Computer Assignment #2
Assigned: 14 March 2008. Due: 28 March 2008
Introduction
Dr. Perkins and his students have developed a 6 degree of freedom wireless intertial sensor for
mounting on bowling balls; see Figure
1
. This sensor can be used to measure the the velocity of
the center of mass and the angular velocity of the bowling ball as it is released from the bowler’s
hand. Your job is to help Dr. Perkins predict the dynamics of the ball as it travels down the lane.
Consider a bowling ball of mass
m
, moment of inertia about its center
I
= 2
/
5
mr
2
and radius
r
traveling along a bowling lane with length
L
and coeﬃcient of friction
μ
; see Figure
2
. The distance
traveled by the ball is described by the coordinate
x
, and the rotation of the ball is described by
the angle
θ
. The bowler releases the ball at
x
0
and
θ
0
, with initial speed ˙
x
0
and angular velocity
˙
θ
0
.
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 Spring '09
 PERKINS
 Mechanical Engineering, Force, Friction, Mass, Bowling ball

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