Question: A block weighing 20 N oscillates at one end of a vertical spring for which k = 100 N/m; the other end of the spring

A block weighing 20 N oscillates at one end of a vertical spring for which k = 100 N/m; the other end of the spring is attached to a ceiling. At a certain instant the spring is stretched 0.30 m beyond its relaxed length (the length when no object is attached) and the block has zero velocity.
(a) What is the net force on the block at this instant? What are the
(b) Amplitude and
(c) Period of the resulting simple harmonic motion?
(d) What is the maximum kinetic energy of the block as it oscillates?

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