According to Newton's third law of motion, for every action, there is an equal and opposite reaction. Therefore, the fence will exert a reaction force on the lawn chair that is equal in magnitude but opposite in direction to the force exerted by the chair on the fence.
In this case, the force exerted by the chair on the fence is 8 N. Therefore, the reaction force exerted by the fence on the chair will also be 8 N, but in the opposite direction.
The wind blows a lawn chair that weighs 4 kg into a fence with a force of 8 N. How much reaction force does the fence exert on the chair?
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