1. 1D Kinematics Lab Part A
Question: What happens to the horizontal rate of a marble after going down a ramp?

2. Procedure Materials Roll marble down ramp
Start time when the marble is ejected from the ramp.
Stop time when the marble reaches 20 cm.
Record time, repeat 4 more times
Repeat steps 1-4 for 40, 60, 80, & cm
Plot graph of points (15 points total)
Ramp
Marble
Meter stick
Stop watch
Notebook, Graph paper, & Writing Utensil
While you are finishing the write up think about/jot down answers for the pre lab questions
Talk with your group for 3 minutes
Share with the class
20cm
40cm
60cm
80cm
100cm

3. Prelab Questions
Make a prediction. What happens to the horizontal rate of a marble after going down a ramp?
Why are we using a ramp if we are measuring horizontal distance?
How can we make sure our marble begins moving horizontally at the same rate for each trial?
How can we participate in lab roles to collect accurate data?
How will we plot our data? x-axis, y-axis
What else should be included on our graph?

4. Analysis & Conclusion
Draw a line of best fit and determine the overall shape & equation of your graph (see below)
Describe the trend of your data in terms of the marble.
What was your rate at 20cm? 40? 60cm? 80? 100?
What was your average rate overall?
Please show all math & units A
y = mx B
y = mx + b E
y = m (1 / x) F
y = m  x C
y = constant D
y = mx2
After you have drawn your best-fit curve:
Now look at the overall shape (the best-fit curve) of your graph.
Does your graph resemble any of the shapes A through F
shown at the right? For example, does your Graph resemble
shape A? Or is shape B a better fit? or shape C, D, E, or F ?
Choose the shape that fits your graph, and use this shape
to write the correct equation. Below are two examples:
Shape B Shape E
If you choose... y = m x + b y = m (1 / x)
then you write...vf = m ( tavg) + b vf = m (1 / tavg)

5. Distance: how far an object has traveled from the origin
Scalar Quantity
Displacement: change in position
Vector Quantity
Δd = df – di final distance minus initial distance
Variable can also be written as x or s
Why is distance a scalar and displacement a vector quantity?

6. Precision & Accuracy
Precision: The degree of exactness of a measured value.
Significant figures can clue us in to how precise a measurement is.
Accuracy: How results compare to an accepted value.
How do you take a precise measurement?
What were the sig digits yesterday?
How accurate where your data points? How can you tell?
How precise where your data points? How can you tell?
Why were they not precise or accurate?

7. 1D Kinematics Lab Part A: Wrap-up
Complete your graph and paste/tape it into your lab notebook.
Use the conclusion rubric to complete your 1D kinematics lab. (You will turn this into me Friday-ish)
Make sure the lab is in your TOC.