1st Quarter Review

Today:

In class today for our lab practical we dropped a thin plastic sheet through a motion detector and examined it's  position vs. time and velocity vs. time graphs. The relationship of the position vs. time graph was squared and the relationship of the velocity vs. time graph was linear. We learned about this yesterday and that a curved position vs. time graphs gives you a linear velocity vs. time graph and acceleration. 

These two pictures of people running is a good example of what we have been learning this first quarter. We learned all about speed, velocity, distance, acceleration and movement. If I wanted too I could graph all of these runners using the great knowledge that I have learned this quarter. 

Unit 1 

In unit 1 we learned about: 

Accuracy- closeness
Precision-consistency 

Qualitative- qualities measurements

Quantitative- numbers measurements

We learned about the 5 different graph shapes no relationship, direct, inverse, exponential, square root and all of their mathematical equations. 

Kilo=1000 Centi=.01 Mili-.001
D= V/ T

Unit 2

In unit 2 we learned about:

Scalar (a number that has magnitude)- distance & speed 

Vector (has magnitude and direction)- displacement and velocity 

Velocity-average speed

Graphing Rules

1. The slope of a position vs. time graph is velocity 

2. The slope of a velocity vs. time graph is acceleration

3. The area under the "curve" of a velocity vs. time graph is distance.

We learned how to tell on graphs when two objects are moving which object is moving faster and which object has moved further. You can figure these out by if which slope is steeper, and which is longer on the x axis. When the lines of a position vs. time graph is direct, then the line of a velocity vs. time graph is a straight horizontal line. 

Unit 3 

In unit 3 we learned about:

A= V/T  Units: m/s2

Curved position vs. time graphs give you acceleration

DAT, VAT, & VAD

We learned how to do kinematics equations and which steps to follow: Write down the question, write down givens, sketch, choose equation, plug in and box your answer. 

We went over lots of graphs having to do with velocity and acceleration. We learned how to go from a position vs. time graph to a velocity vs. time graph to a acceleration vs. time graph.