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An orange sits on a table in equilibrium. What forces are acting on it? What is the reaction force to each of the forces acting on it? What are the action and reaction pair?

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    $\begingroup$ You have to show us your attempt to solve the problem so that we can help you. $\endgroup$ – Alberto Navarro Sep 8 '18 at 7:41
  • $\begingroup$ Related physics.stackexchange.com/q/301609/104696 $\endgroup$ – Farcher Sep 8 '18 at 7:59
  • $\begingroup$ The forces acting are the force of gravity and the normal force of the table.the reaction force of the force of gravity is the normal force of the table and vice versa.the reaction pairsis the force of gravity and the normal force of the table... $\endgroup$ – Jane Sep 8 '18 at 10:40
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Force of gravity and normal reaction by table are not action reaction pair. Due to gravity, the object (here orange) exerts a force equal to its weight W=mg on the table and then the table exerts equal and opposite force which is normal reaction in this case. If the surface makes an angle, say A, with horizontal, then the normal reaction will be perpendicular to surface but will not be equal to mg. Instead, normal reaction force in this case is N=mg cos(A)

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