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Two identical springs of spring constant...

Two identical springs of spring constant k are attached to a block of mass m and to fixed supports as shown in figure. When the mass is displaced from equilibrium position by a distance x towards right, find the restoring force.

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When the mass is displaced from equilibrium position by adistance x, the total restoring force due to both the springs will be towards left and is given by
`F = F_(1) + F_(2) = -kx + (-hx) =-2kx`.
Negative sign means that the direction of force F is opposite to direction of x.
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