The LAWS of Motion Or, Who is this Newton guy and why are they saying such nasty things about him? D Taylor Greenwich HS, CT © 2010, 2011, 2012 (Just in case…)

Final vote? 9-5 No…

Overview; 3 Laws of Motion –Based on Galileo’s work 1. Description of inertia 2. Relation between F, m, & a 3. The ever-popular action/reaction

Overview; 1 st : An object at rest will remain at rest & an object in motion will remain in motion in a straight line unless acted on by an outside force. –Common ‘ Mercan? All things wanna do what they ’ re doin ’ !

Overview;

Bike Accident Gravity and Motion10 Death-Defying m-stick demo (DO NOT attempt this at home. I am a semi-trained semi-professional…) Basketbowling Ball demo

Overview; 2 nd : An object ’ s acceleration is proportional to the net force acting upon it and inversely proportional to it ’ s mass. –Common ‘ Mercan? FMA

An UNBALANCED force Will cause Something To change it’s motion

Overview; 3 rd : When one object is in ‘contact’ with another there exists equal and opposite forces between them.

Overview; 3 rd : When one object is in contact with another there exists equal and opposite forces between them.

Overview; –Common “ Mercan? For every action there is an equal and opposite reaction F = -F

Nitty Gritty? Definitions? –Inertia –Mass –Force –Newton –Weight –Gravity Acceleration of Force of

Nitty Gritty? Inertia? –Property of matter that resists a change in its motion No units, not a #!

Reese Witherspoon Reese Withouterspoon

Nitty Gritty? Mass? –Measure of inertia Units - kg

Nitty Gritty? Force? –Push or pull Units ?

Challenge AUDIENCE! NEED folks NOW. –TEAM & LIVE TV audience. –Compeition Nov 03: Leave from train 9PM Competition 11:30PM Return here ~ 2PM –Parent & Teacher forms!!!

Nitty Gritty? Weight? –Force between YOU and the Earth! Unit - N

Nitty Gritty? Gravity? –Force between two objects caused by their masses…

Nitty Gritty? Gravity? –M 1 attracts M 2 –Why? Isaac Albert

Uncle Newt’s Law of Universal Gravitation

Uncle Al’s General Theory of Relativity (Gravitation)

Gravity Steel-Cage Match!: Isaac vs Albert

In this corner, weighing in at a wimpy 134 pounds, Isaac “Sociopath” Newton! And in this corner, weighing in at a healthy 175 pounds, Albert “The Tongue” Einstein! Who wins???

Gravity and Motion46

A little Intro… Cosmological Constant (Dark Energy) 1917 Einstein proposes Cosmological Constant to ‘fix’ the equation (stopped U from expanding…) 1929 Hubble discovers Expansion of the Universe 1934 Big Al calls his CC “my biggest blunder” Astronomers find evidence for CC in Dark M&E 2000 Astronomers agree Big Al was “right even when he was wrong”

EXTREME Close up

The Monster in the Middle

What’s on the other side…?

Tech-TV Blunder!

NTQ’S LINK End; Part Uno

Nitty Gritty? Definitions? –Friction Coefficient of Static Kinetic Rolling

Nitty Gritty? m FAFA FfFf

M 1 FgFg FfFf M 2

Nitty Gritty? FgFg FfFf F // F⊥F⊥   Why is  =  ?

Atwood Machine 3 kg 4 kg F g =W=40 N F g =W=30 N  F = ?

Atwood Machine 3 kg 4 kg F g =W=40 N F g =W=30 N

Nitty Gritty? Gravity? –Force between ANY two masses –Not same as ‘ g ’ ACCELERATION OF Gravity!