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

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.

3. 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.

4. 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.