Modeling with Higher Order Differential Equations
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Two springs are attached in series as shown in Figure 5.42. If the mass of each spring is ignored, show that the effective spring constant k ot the system is defined by I/k = I/k + I/k2.
A mass weighing W pounds stretches a spring 1/2 foot and stretches a different spring 1/4 foot. The two springs are attached, and the mass is then attached to the double spring as shown in Figure 5.42. Assume that the motion is free and that there is no damping force present. Determine the equation of motion if the mass is initially released at a point 1 foot below the equilibrium position with a downward velocity of ft/s.
(C) Show that the maximum speed of the mass is ....
FIGURE 5.42 Attached springs in Problem 20
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Proof:
(a) Suppose there is a force acting on the double strings. It stretches ...
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