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ANGULAR DYNAMICS Unit 16 Dr John P. Cise,
Professor of Physics,
Austin Community College, 1212 Rio =
Grande
St., Austin Tx. 78701 jpcise@austincc.edu & NYTimes=
March 17,2011 by Pete Thamel=
span>
WASHIN=
GTON
— The public life of Butler Coach Brad Stevens took a precipitous upt=
ick
last spring when P=
resident
Obama called and David
Letterman encouraged him to “get some chocolate milk.̶=
1;
INTRODUCTION: Mass of 0.624 Kg and Diamet=
er of
9.39 inches. The moment of inertia of a hollow sphere i=
s 2/3MR2.
Questions: (a) Find the radius of
basketball in meters? Hint: 0.0254 meters =3D 1 inch (b) Find moment of in=
ertia
(I) of basketball?(c) If=
the
basketball is rotating at 100 rpm, find the kinetic energy of the
basketball? HINT: angular velocity =3D 2 [pi] f. Be sure to find angular velo=
city in
radians/s first. (d) Find the work needed to get the basketball u=
p to 100
rpm? (e) What is the angular momentum of the basketball at=
100
rpm? (f) What was the impulse needed to achieve the angular momentum=
in (e)? ANSWERS:&=
nbsp;
(a) r =3D 0.11925 meters, (b) I =3D 0.005857 Kg m=
2,
(c) 0.3208 J , (d) 0.3208 J , (e) 0.0613 kg m/s , (f) 0.0613=
kg
m/s
Regulation basketballs are=
made
of leather and have a
The
baby-faced Stevens led Butler on a charmed run to the national =
title
game, coming inches away from an epi=
c upset
of Duke when Gordon Hayward’s halfcou=
rt
heave rimmed out at the buzzer. As Stevens emerged as a household name and
Butler established itself as a brand program, few things have changed for a
team that has prided itself on consistent success.