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Questions and answers by
Santiago Gómez
Answers (1)
The spring is also causing the blocks to move in same direction as the Net force: Workspring = ½ k xi2 - ½ k xf2 Workspring = ½ 250 0.22 - ½ 250 02 Workspring = 5 J Workgravity + Workgspring = ½ m v2 33.6 + 5 = ½ (20+30) v2 v = 1.25 m/s
