Consider the following situations: I) A pitcher throws a fast ball; II) A pencil rests on your desk; III) A car hits a tree; IV) The wind pushes a sailboat. In which situation(s) do(es) a pair of equal forces acting in opposite directions exist

Explanation:

Applications of newton's third law of motions proves the validity of all the situations and as such, pair of equal forces acting in opposite directions exist in all the situations ( I, II, III and IV)

Newton's third law states that for every action, there will be an equal and opposite reaction. action and reaction are subject to the third law.

the closer the planet is to the sun, the larger the gravity