# Mechanics

- Created by: wewewee
- Created on: 01-04-15 09:24

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- Mechanics
- Equilibrium
- Scalar - physical quantity
- Vector - direction + magnitiude
- tan=sin/cos
- sin^2+cos^2=1
- Moments
- Principle of Moments
- sum of clockwise = sum of anticlockwise

- moment about a point is F x perpendicular d from the line of action
- Couples
- A pair of equal and opposite forces not acting along the same line

- Principle of Moments

- Moving
- circular v = 2pi r/T
- d-t graph
- gradient = speed

- v-t graph
- gradient = acceleration
- Area under = distance

- Free Fall
- s=1/2at^2 +ut y=mx +c
- 2x grad = acceleration
- x=t^2 y=s

- Forces
- 1st law: stay at rest or constant unless Force
- T=mg+ma
- Stopping d
- think + brake
- alcohol,mobil ice,tyres

- safety
- F=change KE /impact distan
- bumper=low v crumple zone, airbags
- seat belt, collapsible wheel

- Work
- area/work= 1/2FL
- P=Fv
- 1/2mv^2= mgh
- P=E(W)/t
- area/work= Fd

- Equilibrium

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