Kinematics (Review)
 Santa Claus's Crash Landing The old man has landed on the top of the roof of my house in Canada. Due to the large amount of ice on the roof, he starts to slide down the roof.Determine the vertical and horizontal speeds at which Santa Claus hits the ground using kinematic equations. (solution)
 Simulations

Special Case: Uniform Circular Motion 

Maze Game: Control ball by controlling r,v,a 

 Selected Problems.
 3.38 Buried Treasure
 4.59 Centrifuges
Dynamics
1. Key Relationships
Newton's 1st Law (define force: if no force, then no change in movement)
$$ { { \mathbf { \vec F }_{net} } = 0 \, \rightarrow \, \Delta \mathbf { \vec v}} = 0 $$
Newton's 2nd Law (how an unseen force results in visible acceleration → defn. of mass) $$ \mathbf { \vec a } = { { 1 \over m }{ \vec F }_{net}}$$
Combining Forces
$$ \mathbf { \vec F }_{net} = \sum \mathbf { \vec F }_{i} $$
2. Types of Forces
 Contact
 Spring Force (Push or Pull) (F_{sp})
 Tension Force (Pull only) (T)
 Normal Force (n)
 Friction Force (f)  opposite direction of motion
 drag (D)  opposite direction of motion
 thrust (F_{thrust})
 Long Range
 gravity
 electric
 magnetic
3. FreeBody Diagrams (including all the forces on an isolated body)
4. Forces in 1D (1041 Lecture 6)
5. Drawing Free Body Force Diagrams: From different student perspectives