\(\def \u#1{\,\mathrm{#1}}\) \(\def \abs#1{\left|#1\right|}\) \(\def \ast{*}\) \(\def \deg{^{\circ}}\) \(\def \ten#1{\times 10^{#1}}\) \(\def \redcancel#1{{\color{red}\cancel{#1}}}\) \(\def \BLUE#1{{\color{blue} #1}}\) \(\def \RED#1{{\color{red} #1}}\) \(\def \PURPLE#1{{\color{purple} #1}}\) \(\def \th#1,#2{#1,\!#2}\) \(\def \lshift#1#2{\underset{\Leftarrow\atop{#2}}#1}}\) \(\def \rshift#1#2{\underset{\Rightarrow\atop{#2}}#1}}\) \(\def \dotspot{{\color{lightgray}{\circ}}}\)

How Things Move

Why Things Move

Index for
Chapter 5: Impulse and Momentum

Index for
Chapter 7: Thermodynamics

Index for
Chapter 6
Energy

1. Energy Conservation

conserved
\(E_f=E_i+\Delta E\)

2. Work

work
Work (\(W\)) measured in J
\(W=Fd\cos\theta\)
\(E_f=E_i+W\)

3. Kinetic Energy

kinetic energy
Kinetic Energy (\(E_K\)) measured in J
\(E_K=\frac12mv^2\)

4. Frictional Work

5. Gravity and Work

gravitational potential energy
potential energy
Gravitational Potential Energy (\(E_G\)) measured in J
\(E_G=mgh\)

6. Springs

spring constant
stiffness
Spring Constant (\(k\)) measured in N/m
Spring Potential Energy (\(E_S\)) measured in J
\(F=k(L-L_0)\)
\(E_S=\frac12k(L-L_0)^2\)

7. Potential Energy

If a system at rest moves spontaneously, it will move so as to decrease its potential energy.

8. Height from What?

You can measure the height from any reference point you choose,

9. Collisions

elastic
inelastic
maximally inelastic

10. Power

power
watts
kilowatt-hours
Power (\(P\)) measured in W
\(P={\Delta E\over\Delta t}\)

11. Power Flow

kilocalories
\(\Delta E=(P_{in}-P_{out})\Delta t\)

12. Intensity

intensity
Intensity (\(I\)) measured in W/m²
\(I={P\over A}\)

13. Assessment Objectives