Which of the following is true about action-reaction forces in Newton’s third law of motion?

They must act on the same object in the same direction.

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They must act on the same object in opposite directions.

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They must act on different objects in the same direction.

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They must act on different objects in opposite directions.

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Solution

The correct option is D They must act on different objects in opposite directions.
According to Newton's third law of motion, for every action there is an equal and opposite reaction. But these two forces act on two different objects and not on the same object. If these two forces being equal in magnitude acted on the same body, they would cancel out each other and the resultant would be zero.

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Similar questions

Q. According to the third law of motion, action and reaction :

(a) always act on the same body but in opposite directions
(b) always act on different bodies in opposite directions
(c) have same magnitudes and directions
(d) act on either body at normal to each other

Q. When two equal forces act on an object in opposite directions, they are known as:

Action and reaction act on the
(a) same body in opposite directions
(b) different bodies in opposite directions
(c) different bodies, but in same direction
(d) same body in same direction.

Two forces act on the object in the same direction, and then in opposite directions. What will be the net force on the object in each of the two cases?

Which statement is true in case of multiple forces acting on an object in the same direction?

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