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Philadelphia Flyers player Mike Richards stands on the frictionless ice next to the goal. Neither Mike nor the goal are anchored to the ice. Frustrated after a recent playoff loss, 102.5kg Mike suddenly pushes on the goal, sending it across the ice a 2.80m/s. Mike recoils in the opposite direction at velocity 1.12m/s. Find the mass of the goal

  • Physics -

    m2 =m1•v1/v2 =102.5•1.12/2.8 = 41 kg

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