2. A mass of 4 pounds stretches a spring 0.4 feet. The mass moves through a medium which offers a damping force that is numerically twice the value of the instantaneous velocity. a) Find the equation of motion if the mass is released from rest 1 foot below the equilibrium position. b) Find the time the mass passes through the equilibrium position for the first time. Solve using algebraic techniques. л c) Find the velocity of the mass and direction (upwards or downwards) at /==sec. 4

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