H H Forces and Newton's Laws of Motion

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Newton's Three Laws of Motion

"If I have seen further it is by standing on the shoulders of giants."


A Short History of Nearly Everything
by Bill Bryson

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I, II, III
 
How do we measure mass?


and we can also use Newton's Second Law
The Four Fundamental Forces

Gravity
Electromagnetism
Weak Nuclear Force
Strong Nuclear Force
Mechancical Universe

Inertial Frames of Reference

A frame of reference in which Newton's first law is valid.

Newton's first law can be used to define what we mean by an inertial frame of reference, it is sometimes called the law of inertia.

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Freebody Diagrams
  Freebody Diagram 

 
Freebody Diagram

Forces cause a change in motion. A change in the state of an object's motion.

There is always an increase or decrease in velocity if the Forces on an object are unbalanced.

 

Tony's Forces

Applications to Newton's Laws