Newton’s Three Laws of Motion – Day #2

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Presentation transcript:

Newton’s Three Laws of Motion – Day #2 Dynamics Newton’s Three Laws of Motion – Day #2

Newton’s Third Law “Every action has an opposite and equal reaction”. If one object exerts a force on a second object, the second object exerts the exact same force on the first but in the opposite direction.

Some Third Law Examples You punch a wall, it punches back with the same force… you break your hand. You kick a table, it kicks you back with the same force… you stub your toe. A mass is on a table, gravity exerts a force downwards, the table pushes the mass upwards… the normal force.

Eg. 4: Andrew and Eric are standing on perfectly smooth ice Eg.4: Andrew and Eric are standing on perfectly smooth ice. Eric pushes Andrew with a force of 20N [R]. If Eric and Andrew have a mass of 75kg and 65 kg respectively, find: The reaction force that Andrew applies against Eric. Andrew’s acceleration. Eric’s Acceleration.