Question

Here we consider the two masses m1 and m2 connected this time by springs of stiffnesses k1, k2 and k3 as shown in the figure below. The movement of each of the 2 masses relative to its position of static equilibrium is designated by x1(t) and x2(t).

х (1)<x 02 xi(t) 0 WWWWWWW {y Tu k2 m ki

1. Demonstrate that the differential equation whose unknown is the displacement x1(t) is written as follows:

mıži = -(k1 + k2)x1 + k2x2

2. Determine the second differential equation whose unknown is the displacement x2(t).

3. Determine the free oscillatory motion of each mass when mass m1 is moved 0.1 m away from its equilibrium position by leaving it to stand on its own without initial velocity, with mass m2 initially held at its static equilibrium position without initial velocity (here consider: m1 = m2 = 1kg and k1 = k2 = k3 = 100 N/m).

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Answer #1

kg foros foron ma when masses stretch - Froroon mf Equilbril ooo formal at time t fm 2 Xq (y force on mas m. F = -x - Kq (Xq

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