momentum or, “how to make newton’s laws even more complicated without even trying…” daryl l...
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![Page 1: Momentum Or, “How to make Newton’s Laws even more complicated without even trying…” Daryl L Taylor Greenwich HS, CT ©2004, 2006, 2007, 2009, 2012 (Just](https://reader035.vdocument.in/reader035/viewer/2022062409/5697bfe91a28abf838cb7057/html5/thumbnails/1.jpg)
MomentumOr, “How to make Newton’s
Laws even more complicated without even trying…”
Daryl L TaylorGreenwich HS, CT
©2004, 2006, 2007, 2009, 2012 (Just in case…)
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Nitty Gritty?
Definitions?
•‘member FMA?
F ma
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vF m
t
Ft m v
Ft mv
F ma
ImpulseLatin impulsus, from past participle of impellere, to impelImpel: See impulse…
MomentumLatin mōmentum, movement
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Nitty Gritty?
Definitions?
•P Conservation
' '1 1 2 2 1 1 2 2
i fP P
m v m v m v m v
Why?
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1 2
1 1 2 2
1 1 2 2
1 1 2 2
F F
m a m a
m v m v
t tm v m v
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POP QUIZ;
#1
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2-D Momentum
Momentum is a linear vector
1 2
1 1 2 20 0m v m v
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2-D Momentum
Angles?
m1v1i
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2-D Momentum
Angles?
m1v1i
m1v1f
m2v2f
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2-D Momentum
Angles?
m1v1i
m1v1f
m2v2f
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POP QUIZ;
#2
2.5 m/s
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Types of Collisions;
•Elastic AND KE are conserved
i f
i fKE KE
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Types of Collisions;
•Inelastic ONLY are conserved
i f
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POP QUIZ;
#3
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MV & cm
cm• Center of Mass
NOT to be confused with Center of Gravity (cg)
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MV & cm
Cm• Examples
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MV & cm
cm
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MV & cm
Cm – Hume Beans• Bending over• Sitting• Standing• Walking• One-Leg Lift (Wall & Free-standing)• Butt against wall – Touch toes• Chair pick-up• Babies vs Adults
Head size – ¼ vs 1/8
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MV & cm
Cm – Hume Beans• Wile E. Coyote Video• m-stick and hat• Rolling UP HILL demo