I have seen previous explanations for this same example on this website. However, I do not understand why they do not count the friction force to be present when they solve for the normal forces on each arm separately. Please I would appreciate the help. Answer.16.27 The 10-in.-radius brake drum is attached to a largerflywheel that is not shown. The total mass moment of inertiaof the drum and the flywheel about point C' is 15 lb · ft · s²,and the coefficient of kinetic friction between the drum andthe brake shoes is 0.35. When the hydraulic cylinder Fisactuated, it exerts a force of 30 lb directed to the right onpoint B and to the left on point E. Knowing that the angularvelocity of the flywheel is 360 rpm counterclockwise when Fis actuated, determine the number of revolutions executed bythe flywheel before it comes to rest.Answer193.9 rev.A6'in.B12 in.Fig. P16.27 and P16.286 in.F10 in.6 in.DE6 in.12 in.

The free-body diagrams of the forces acting on the brake drum and the forces acting about point D…

Answered: . 16.27 The 10-in.-radius brake drum is…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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I have seen previous explanations for this same example on this website. However, I do not understand why they do not count the friction force to be present when they solve for the normal forces on each arm separately. Please I would appreciate the help.

Answer
.
16.27 The 10-in.-radius brake drum is attached to a larger
flywheel that is not shown. The total mass moment of inertia
of the drum and the flywheel about point C' is 15 lb · ft · s²,
and the coefficient of kinetic friction between the drum and
the brake shoes is 0.35. When the hydraulic cylinder Fis
actuated, it exerts a force of 30 lb directed to the right on
point B and to the left on point E. Knowing that the angular
velocity of the flywheel is 360 rpm counterclockwise when F
is actuated, determine the number of revolutions executed by
the flywheel before it comes to rest.
Answer
193.9 rev.
A
6'in.
B
12 in.
Fig. P16.27 and P16.28
6 in.
F
10 in.
6 in.
D
E
6 in.
12 in.

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