\(\def \u#1{\,\mathrm{#1}}\)
\(\def \us#1{\,\mathrm{\scriptsize #1}}\)
\(\def \abs#1{\left|#1\right|}\)
\(\def \ast{*}\)
\(\def \deg{^{\circ}}\)
\(\def \tau{\uptau}\)
\(\def \ten#1{\times 10^{#1}}\)
\(\def \redcancel#1{{\color{red}\cancel{#1}}}\)
\(\def \BLUE#1{{\color{blue} #1}}\)
\(\def \RED#1{{\color{red} #1}}\)
\(\def \PURPLE#1{{\color{purple} #1}}\)
\(\def \th#1,#2{#1,\!#2}\)
\(\def \lshift#1#2{\underset{\Leftarrow\atop{#2}}#1}}\)
\(\def \rshift#1#2{\underset{\Rightarrow\atop{#2}}#1}}\)
\(\def \dotspot{{\color{lightgray}{\circ}}}\)
\(\def \ccw{\circlearrowleft}\)
\(\def \cw{\circlearrowright}\)
How Things Move
Why Things Move
weight
newton
normal force
tension
- Weight (\(W\)) measured in Newtons (N)
- Normal Force (\(N\)) measured in Newtons (N)
- Tension (\(T\)) measured in Newtons (N)
force diagram
static friction
- Static Friction (\(S\)) measured in Newtons (N)
mass
weight
- Mass (\(m\)) measured in kilograms (kg)
- Weight (\(W\)) measured in Newtons (N)
restoring force
hooke's law
spring constant
\(T=k\Delta L\)
\(N=k\Delta L\)
torque
pivot
lever arm
newton-meters
- Torque (\(\tau\)) measured in N m
\(\tau = rF \hbox{ when \(\vec r\perp \vec F\)}\)
\(\tau = 0 \hbox{ when \(\vec r\,\Vert\,\vec F\)}\)
\(\tau=rF\sin\theta\)