part 2 please

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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part 2 please

The uniform semicircular bar of radius r = 120 mm and mass m = 3.2 kg rotates freely about a horizontal axis through the pivot O. The
bar is initially held in position 1 against the action of the torsional spring and then suddenly released. Determine the spring stiffness KT
which will give the bar a counterclockwise angular velocity w = 4.3 rad/s when it reaches position 2, at which the spring is undeformed.
A
kT
Part 1
Answers:
Vg1 =
m
Correct
Measure gravitational potential energy from point O. Find the gravitational potential energy in positions 1 and 2.
Hint
Vg3 = 2.398
Part 2
-3.767
eTextbook and Media
A'
00
N•m
N•m
Find the kinetic energy in positions 1 and 2.
Attempts: 1 of 3 used
Transcribed Image Text:The uniform semicircular bar of radius r = 120 mm and mass m = 3.2 kg rotates freely about a horizontal axis through the pivot O. The bar is initially held in position 1 against the action of the torsional spring and then suddenly released. Determine the spring stiffness KT which will give the bar a counterclockwise angular velocity w = 4.3 rad/s when it reaches position 2, at which the spring is undeformed. A kT Part 1 Answers: Vg1 = m Correct Measure gravitational potential energy from point O. Find the gravitational potential energy in positions 1 and 2. Hint Vg3 = 2.398 Part 2 -3.767 eTextbook and Media A' 00 N•m N•m Find the kinetic energy in positions 1 and 2. Attempts: 1 of 3 used
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