Red_AtNight t1_iu4v0fw wrote
Reply to comment by breckenridgeback in ELI5:A child causes a wagon to accelerate by pulling it with a horizontal force. newton's third law says that the wagon exerts an equal and opposite force on the child. how can the wagon accelerate? by Gbo_the_beast
> say, if the child is on a surface with ~zero friction, as if they were on ice skates
A better approximation of a frictionless surface would be standing on ice in tennis shoes. Wearing ice skates is not a frictionless surface because the blades have edges that cut into the ice.
Otherwise a great explanation.
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