Index for
Chapter 2
Laws of Motion

1. Velocity vs Speed

• speed
• speed
• velocity
• Speed ($v$) measured in m/s
• Velocity ($\overrightarrow{v}$) measured in m/s

2. Newton's First Law

• newton's first law
• inertial frames of reference
• If the forces on an object are balanced, the object will maintain a constant velocity.
  If an object is maintaining a constant velocity, then the forces on it are balanced.

3. Kinetic Friction

• kinetic friction
• coefficient of kinetic friction
• Kinetic Friction ($K$) measured in N
• Coefficient of Kinetic Friction (${\mu }_K$) no units
• $\overrightarrow{K}={\mu }_{K}N\text{ opposite the direction of motion}$

4. Coefficients of Friction

5. Air Resistance

• air resistance
• drag

6. Newton's Third Law

• newton's third law
• force pair
• force twins
• If A exerts a force on B,
  then B also exerts a force on A.
  These forces have the same strength,
  are the same type,
  and point in opposite directions.

7. These are NOT Force Pairs

8. Newton's Second Law

• net force
• acceleration
• newton's second law
• mass
• inertia
• The acceleration of an object is equal to the net force on it, divided by its mass.
  $\overrightarrow{a}=\frac{{\overrightarrow{F}}_{net}}{m}$

9. Acceleration

10. Angular Acceleration

• angular acceleration
• moment of inertia
• Moment of Inertia ($I$) measured in kg m²
• $\alpha =\frac{{\mathrm{\tau }}_{net}}{I}$

11. Assessment Objectives