The mechanism shown is one of two identical mechanisms attached to the two sides of a 185-lb uniform rectangular door. Edge ABC of the door is guided by wheels of negligible mass that roll in horizontal and vertical tracks. A spring of constant k is attached to wheel B in such a way that its tension is zero when e = 30°. Knowing that the door is released from rest in the position e = 45° and reaches the vertical position with an angular velocity of 0.6 rad/s, determine the spring constant k. k B 5 ft 5 ft

The mechanism shown is one of two identical mechanisms attached to the two sides of a 185-lb uniform rectangular door. Edge ABC of the door is guided by wheels of negligible mass that roll in horizontal and vertical tracks. A spring of constant k is attached to wheel B in such a way that its tension is zero when e = 30°. Knowing that the door is released from rest in the position e = 45° and reaches the vertical position with an angular velocity of 0.6 rad/s, determine the spring constant k. k B 5 ft 5 ft

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

The mechanism shown is one of two identical mechanisms attached to the two sides of a 185-lb uniform rectangular door. Edge ABC of
the door is guided by wheels of negligible mass that roll in horizontal and vertical tracks. A spring of constant k is attached to wheel B
in such a way that its tension is zero when e = 30°. Knowing that the door is released from rest in the position e = 45° and reaches the
vertical position with an angular velocity of 0.6 rad/s, determine the spring constant k.
5 ft
C
5 ft
The spring constant is 58.72
Ib/ft.

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