3) A block of mass m hangs vertically at rest from a light cord of length l. A bullet of mass it with horizontal velocity 1) hits the block passes through and emerges with horizontal velocity 3, setting the block into small oscillation. 2 a) What are the frequency and amplitude of the resulting simple harmonic motion of the block, assuming air drag can be ignored? b) Now assume that air drag cannot. be ignored. For what value of the linear drag coefcient C will the motion be critically damped? c) Find the motion of the block as a function of time, assuming that the motion is critically damped