5. A force of 2 lbs is required to stretch a spring 6 in. A mass...
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5. A force of 2 lbs is required to stretch a spring 6 in. A mass of 16 lbs is hung from the spring and is also attached to a viscous damper that exerts a force 2 lb when the velocity of the mass is 1 ft/s. If the mass is pulled down 2 in below its equilibrium position and given an initial downward velocity of 9 in/s, determine its position u(t) at any time t. Give the quasi frequency and quasi period Td. 5. A force of 2 lbs is required to stretch a spring 6 in. A mass of 16 lbs is hung from the spring and is also attached to a viscous damper that exerts a force 2 lb when the velocity of the mass is 1 ft/s. If the mass is pulled down 2 in below its equilibrium position and given an initial downward velocity of 9 in/s, determine its position u(t) at any time t. Give the quasi frequency and quasi period Td.
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