 |
| The Nature of Forces Chapter 2 Notes Section 2-3 Continued.... Page 4 |
|
|
| Newton' Second Law of Motion: Shows a relationship between force, mass, and acceleration. Force = Mass x Acceleration 1N = 1 kg-m/sec/sec - This law explains how force and acceleration are related. - The harder (force) you push / pull the faster the object accelerates. Thus the greater the force, the more acceleration. - Force and acceleration must be related to an objects mass. - Formula: Force = Mass x Acceleration 1 N + 1kg-m/sec/sec - When mass is in kilograms and acceleration is in meters/seconds/seconds, the unit used for Force is 1 Newton (N) Newton's Third Law of Motion For every action there is an equal and opposite reaction. Forces act in pairs. - Every force must have an equal and opposite force. - All forces come in pairs. - Newton arrived at his 3rd Law of Motion by studying the momentum of bodies before and after collisions. - Newton's 1st law explains that forces are necessary to change the motion of an object. - Newton's 2nd law describes that forces and acceleration are related to mass or inertia. - Newton's 3rd law explains that forces act in pairs. Newton's Law of Universal Gravitation All objects in the universe attract each other by the forecs of gravity. - Newton wondered about the force that was making the apple fall to the Earth. Was it the same force that keeps the moon in its path around the Earth? |
 |
 |
 |
 |
|
|
|