Kaczmarek's Courses
Kinematics Review and Study Guide
• When solving kinematics problems, first identify what type of problem you are solving (use your flow chart to help you decide)
• Always remember SIGNS and unit conversions!!!
Uniform Motion (Constant Velocity)
• v = speed (m/s)
• [pic] = velocity (m/s)
• d = distance (m)
• [pic]= displacement (m)
• t = time (m)
• For constant/uniform velocity only, use [pic]
• average speed = [pic] =[pic]
• average velocity = [pic] = [pic]
Uniform Accelerated Motion (Constant Acceleration)
• a = acceleration (m/s2)
• For acceleration problems (ie. a change in velocity problem), need to use one of the following five equations (Note: cannot use [pic]for acceleration problems!!)
o [pic]=[pic]
o [pic]
o [pic]
o [pic]
o [pic]
• These formulas are identical to what is on the formula sheet
Free Falling Objects
• Has to be in the air to be considered free falling
• Acceleration for these problems is always 9.81m/s2 and is a constant value that is always directed down toward the center of the Earth
• Since these are still acceleration problems, use one of the five equations listed above (do not use [pic], this is only for constant velocity!!!)
o Max. height occurs when the vertical velocity is 0.0m/s and for symmetrical problems, occurs at half time
• At the same height, the object has the same speed as it did going up as it does going down
Graphing
• Ned to be able to analyze a distance vs. time graph and a velocity vs. time graph
• When asked a calculation question for a graph, consider using one of the 3 options
o Looking at what the axes represent
o Consider what the calculated slope represents [pic]
o Consider what the calculated area under the graph represent
Two-Dimensional Kinematics
• For vectors that are perpendicular to each other, follow the last two steps (steps 3 and 4) listed below
• For vectors that are not perpendicular to each other, follow all four steps listed below
o Step 1: Draw grid lines on each break and break each vector into its x and y components
o Step 2: Calculate the xtotal and ytotal
o Step 3: Re-draw a new triangle using tip-to-tail method with your xtotal and ytotal and use Pythagorean’s Theorem to calculate the resultant
o Step 4: Find the direction/angle
Projectile Motion
• The horizontal component is uniform motion
o Always use [pic]
• The vertical component is uniform acceleration
o Acceleration is 9.81m/s2 because it is a free falling object
o Need to use one of the five acceleration equations
o Remember at maximum height, v=0.0m/s
o Also remember that at the same height, the object has the same speed as it did going up as it does going down
• Need to solve for time in either the horizontal or vertical component first
o Time is the same for the x component and the y component
Relative Motion Question
• Time is the same on all sides of the triangle
• Can only use trig. and Pythagoreans Theorem if all units are the same
• Be sure to keep all the vertical, horizontal, or diagonal information separate (except for time)
o When using [pic], need to be using all vertical information only (or all horizontal information only or all diagonal information only). For example, you cannot use a vertical distance and a horizontal speed to calculate time.
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related searches
- why online courses are bad
- financial courses online free
- certified financial planner courses online
- financial planning courses online free
- online courses good or bad
- online english courses for beginners
- financial planning courses online
- when did online courses begin
- free high school courses history
- certified financial planning courses online
- florida teacher certification courses online
- uic online courses spring 2019