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Kelly sits on a rock. Her weight is an action force. Describe the reaction force.
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Kelly sits on a rock. Her weight is an action force. Describe the reaction force.

User Pepito Fernandez
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An equal and opposite force acting upwards
User Yuvanesh
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The rock exerts an equal and opposite force on kelly's mass. The rock exerts the same force equal to kelly's mass, to make her sit on the rock, else, the rock would penetrate into the earth along with Kelly!
User Novakov
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