Forces

Combining Force Vectors: Resultants

Representing forces as vectors — magnitude, direction, and scale

Start of Unit All Lessnewons Combining Force Vectors →
Do Now warm-up prompt

Forces - any straight-line push or pull

Myth or Fact ?
Newton's apple

“The most beautiful thing we can experience is the mysterious... It is the source of all true art and all science.”

— Einstein

Forces include magnitude and ____ .
Is gravitational force constant or changing? Why?

Video Instruction

showmethephysics.com

All Force Notes

Unit 1 - Forces

Push

Monkey pushing a ball

Pull

Man pulling a weed

A. Representing Forces

1. Units of force

a) lb. (English)

Wrestler

b) Newton (metric) — weight of 1 apple

Newton and the apple tree

2. Forces are VECTORS

Vector - Despicable Me

— described using:

— magnitude (size)

— direction  Throbbing arrow

Compass rose showing N S E W

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

Boy scout with staff and compass
(know your directions)
Given Force arrow diagram

Scale: 1 cm = 10 N

↓

F = 40 N East

*Length shows magnitude (size)
**arrow shows direction

Newton and the apple tree

Combining Force Vectors →