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When doesn't 100 + 100 = 200?

Vector Addition - The Setup

 

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B. Combining Force Vectors

 


Result
ant- single vector that will have the same effect as two or more vectors

 

 

 

2 + 2 = 4 Right???

 

Sometimes !!!!!

Not always true
 with vectors

 

Sometimes

2 + 2 = 0

 

 

 

1) Finding Resultants.

 

 

Case I - Forces acting in same direction

 

 

(Angle = 0 degrees)

 

 

 

 

Resultant = 9 N East

 

 

 

Is resultant different than the one above? 

 

 

 

 


RULE when Ө =  0°

Add Forces

 

 

 

 

Case II - Forces acting in opposite direction (Angle = 180°)

 

 

 

 

 

 

 

 

 

 

Resultant = 40 N East

 

 


If  Ө  = 180°

Subtract smaller vector
from larger

 

 

 

Range of
Resultants

 

 

 

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