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"The most beautiful thing
we can experience
is the mysterious...
It is the source
of all true art
and all
science."
- Einstein
Video Instruction
showmethephysics.com
Unit 1 - FORCES
Forces - any straight-line push or pull
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A. Representing Forces
1. Units of force
a)
lb. (English)
b) Newton (metric) (weight of 1 apple)
2. Forces are VECTORS
Vector - Despicable Me
- described using:
- magnitude (size)
-
direction
Review - Scalar (magnitude only)
ex) time, distance
Solving problems with vectors
require
a special branch of mathematics
3. When solving problems and drawing pictures, forces are represented as arrows drawn to some selected scale
(know your directions)
Scale: 1 cm = 10 N
F = 40 N East
*Length shows magnitude (size)
**arrow shows direction
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Combining Forces |
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