22-15. A platform, having an unknown mass, is supported by four springs, each having the same stiffness k. When nothing is on the platform, the period of vertical vibration is measured as 2.35 s; whereas if a 3-kg block is supported on the platform, the period of vertical vibration is 5.23 s. Determine the mass of a block placed on the (empty) platform which causes the platform to vibrate vertically with a period of 5.62 s. What is the stiffness k of each of the springs?

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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22-15. A platform, having an unknown mass, is supported
by four springs, each having the same stiffness k. When
nothing is on the platform, the period of vertical vibration is
measured as 2.35 s; whereas if a 3-kg block is supported on
the platform, the period of vertical vibration is 5.23 s.
Determine the mass of a block placed on the (empty)
platform which causes the platform to vibrate vertically
with a period of 5.62 s. What is the stiffness k of each of
the springs?
Transcribed Image Text:22-15. A platform, having an unknown mass, is supported by four springs, each having the same stiffness k. When nothing is on the platform, the period of vertical vibration is measured as 2.35 s; whereas if a 3-kg block is supported on the platform, the period of vertical vibration is 5.23 s. Determine the mass of a block placed on the (empty) platform which causes the platform to vibrate vertically with a period of 5.62 s. What is the stiffness k of each of the springs?
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