Explain Newton's third law with an example

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Newton's Third Law Newton's third law states: For every action, there is an equal and opposite reaction. In other words, if object A exerts a force F_A on B on object B, then object B exerts an equal force F_B on A = −F_A on B on object A. The forces are equal in magnitude, opposite in direction, and act on different objects. Step 1: State the law mathematically F_A on B = −F_B on A Step 2: Example — Person pushing against a wall Consider a person pushing on a wall with their hand. Action force: Hand exerts force F_hand on wall to the right on the wall (magnitude F, say 50 N). F_hand on wall = Fi (50~N to the right) Reaction force: Wall exerts equal and opposite force on hand. F_wall on hand = −Fi (50~N to the left) Step 3: Verify equality Magnitude: |F_hand on wall| = |F_wall on hand| = 50~N Direction: Opposite (right vs. left) Objects: Different (hand vs. wall) The person feels the push back from the wall, but neither moves much due to the wall's large mass. Step 4: Real-world implication These forces don't cancel because they act on different objects. The net force on each determines acceleration via Newton's second law: F_net = ma.

Explain Newton's third law with an example

Step-by-step solution

State the law mathematically

Example — Person pushing against a wall

Verify equality

Real-world implication

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