Physics Problem Solving (Q -45), IIT-JEE physics classes - Videos

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Q.45-A tray of mass M = 12 kg is supported on two identical springs, each of spring constant k. as shown in figure.When the tray is depressed a little and released, it executes simple harmonic motion of period 1.5 s. What is the force constant of each spring ?when a block of mass m is placed on the tray, the period of oscillation becomes 3.0 s.The value of m is ?
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