Can anyone give a example that best explain the law "Every action has an equal and opposite reaction " that can be demonstarted in fornt of a class? Sachin KarpeThis to give a practical...

Can anyone give a example that best explain the law "Every action has an equal and opposite reaction " that can be demonstarted in fornt of a class? Sachin Karpe

This to give a practical demonstartion of the law.

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wannam | High School Teacher | (Level 3) Educator

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One of the most poinent examples of Newton's third law for me has to do with firearms.  I don't think I really understood this physics principle until I observed the recoil on a gun after firing.  If you are allowed to present a video for your demonstration, the recoil on a gun or cannon might be an excellent demonstration.  For a more practical example, simply leaning against a friend can show Newton's third law.  If the other person does not respond to your weight equally, you will fall.  A push can work the same way.  When we push someone else, not only do they move but so do we.  A very simple demonstration might be sliding two rocks into one another across a table.  When the rocks meet, they will knock each other backwards.  This demonstration is clear and simple but somewhat small.  For a larger class, you might need a more visible demonstration.  An a-frame ladder can provide a larger example.  The two sides of the ladder must press against each other equally in order to support the weight of a person climbing the ladder. 

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