An ice rink gives us a good opportunity to think about forces and momentum.Consider two identical hockey pucks, A and B. Puck A is in motion travelling in the positive direction towards Puck B which is at rest. The ice surface is frictionless, so there are no resistive forces acting on the either puck. Below are possible free-body diagrams for puck A. Drag and drop the option that correctly models the forces acting on the puck as it travels across the frictionless ice unassisted. Free-body diagram for Puck A; Which of the diagrams correctly models the forces acting on puck B while it is at rest on the ice?

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