Unit 1 - FORCES

Forces - any straight-line push or pull

A. Representing Forces

1. Units of force

a)  lb. (English)

b) Newton (metric) (weight of 1 apple)

2. Forces are VECTORS

- described using:

magnitude (size)

 & direction

Review - Scalar (magnitude only) 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 

*Length shows magnitude (size)   

**arrow shows direction