3/105 The small 0.2-kg slider is known to move from position A to position B along the vertical-plane slot. Determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. The distance R = 0.8 m, the spring modulus k = 180 N/m, and the unstretched length 8 of the spring is 0.6 m.

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