a. Wo = M*g = 4 * 9.8 = 39.2 N.
d = 39.2N. * 1m/150N. = 0.261 m.
A spring that has a spring constant of 150 N/m is oriented vertically with one end on the ground.
(a) What distance does the spring compress when a 4-kg object is placed on its upper end? in m.
(b) By how much does the potential energy of the spring increase during the compression? in J.
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