Hello Everyone! I hope all is well and you enjoy the lesson. I've been absent, but will be around again soon!
Physics Kinematics and Forces Review (What to Know Plus Examples)
Physics Basics
Scientific Notation
Non-zero numbers always count.
Zeros before numbers never count.
Zeros after a number count if there is a decimal point.
When multiplying/dividing keep least number of significant numbers.
When adding and subtracting keep the least precise decimal place.
Dimensional Analysis
Know how to convert feet to meters, meters per second to miles per hour, etc.
The Scientific Method
Introduction/Hypothesis
Experiment/Procedures/Materials
Data/Analysis
Conclusion
Motion in 1-Dimension
(distance = rate * time)
(Average Velocity)
Accelerated Motion
(Average Acceleration)
(Used to find distance when there is acceleration)
(Used to find instantaneous velocity/speed at a certain time)
(Used with an average velocity and no time)
Forces in 1-Dimension
Newton’s First Law: An object will remain at rest or in constant motion unless acted on by an outside force.
Newton's Second Law: Force = Mass * Acceleration
Newton's Third Law: For every action, there is an equal and opposite reaction.
Free Body Diagrams and Equilibrium
Review the blocks on a pulley problem!
Forces in 2-Dimensions
Know how to add vectors in rectangular <x,y> and polar coordinates <r,θ>
This section is basically the same as 4, but with more concepts
Know how to break vectors up into components (the x and y directions)
Static Friction:
If static friction is greater than the force that causes movement, no movement occurs.
Kinetic Friction:
If the kinetic friction is greater than the force that causes movement, then the object will slow down.
Motion in 2-Dimensions
Same concepts as CH 3 with vectors
Always break velocity up into x and y components dependent on θ
Know velocity/acceleration in the x versus the y direction
