Physics Motion Lab
Physics Motion Lab
Part 1: Constant velocity
Materials – battery powered vehicles, stop watch metric tape measure
Procedure – Time the vehicles for distances of 1 to 10 meters
Graph the results and draw best-fit straight line for each vehicle
Data - Vehicle #1 Vehicle #2
|Time (s) |Dist (m) |Time (s) |Dist (m) |
| |1 | |1 |
| |2 | |2 |
| |3 | |3 |
| |4 | |4 |
| |5 | |5 |
Results - Find the slope of each best-fit straight line.
What units are used to measure the slope?
Conclusions – If your car is running on cruise control, what factors might cause the
velocity to change above and/or below the cruising velocity?
When an airplane is on autopilot, what factors might cause the
velocity to change?
If your car is going east at 25 m/s, give several devices on the car that could change its velocity (remember that velocity is a vector).
Part 2: Constant acceleration
Materials - Ticker tape machine, ticker tape, mass 50 gm and 100 gm
Procedure - Attach mass to ticker tape and let gravity accelerate to tape
Measure the distance traveled every 5 ticks
Repeat for the second mass
Graph the results of distance vs time and draw a best-fit curve to show
acceleration. Calculate velocity = distance/time, and draw a velocity vs
time graph.
Data – Mass #1 Mass #2
|Time(ticks) |Dist(cm) |Velocity (cm/tick) |Time(ticks) |Dist(cm) |Velocity |
| | | | | |(cm/tick) |
|10 | | |10 | | |
|15 | | |15 | | |
|20 | | |20 | | |
|25 | | |25 | | |
|30 | | |30 | | |
|35 | | |35 | | |
|40 | | |40 | | |
|45 | | |45 | | |
Results - Estimate acceleration from the slope of the velocity vs time graph.
Conclusion - Does the heavier mass accelerate faster than the lighter mass?
Example why the acceleration is the either same or different.
Part 3: Free Fall
Materials - stop watch, metric tape measure, falling objects
Procedure - using various place around the school, time an object falling
Measure time to 1/100 s
Measure distance to 1/100 m
For each set of data calculate g = 2 x d / t2
Data –
|Distance (m) |Time (s) |Gravity (m/s2) |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
Results - expected value for gravity is 9.81 m/s2 – find % error
%error = (|expected – observed| / expected) x 100%
Conclusion - Does gravity accelerate all masses at the same rate?
Are there any qualifications to your answer?
What might have caused the error in our measurement/calculation?
Sample Graph Results
Constant velocity slope is velocity
trial #2
distance (m)
trial #1
time (sec)
Constant acceleration slope is velocity
distance (m)
time (ticks or sec)
Constant acceleration slope is acceleration
velocity (m/sec)
time (ticks or sec)
|Lab Report Rubric |
|Looking For… |Way! (2 Pts) |Part Way (1 Pt) |No Way (0 Pts) |
|Title Page with clear information |Colorful and creative with your name,|Title page with some information |No title page |
|about your Lab Exercise |period, date, diagrams or internet |about you and the exercise |No Way! |
| |images | | |
|Purpose: Statement of the reason |Clearly stated purpose in your own |Purpose copied word for word from lab|No purpose |
|for this lab |words, does not have to be a complete|specifications |No Way! |
| |sentence | | |
|Materials: Detailed list of |Neat listing of each piece of |Equipment with less than precise |No materials |
|equipment used in your exercise |equipment with correct spelling |names (i.e. heat thingy rather than |No Way! |
| | |thermometer) | |
|Procedure: |Numbered step by step listing of |Steps copied word for word from lab |No procedure |
|Thorough list of operations |everything that was done in your own |specifications |No Way! |
|performed |words | | |
|Data: (X2) |Clearly labeled charts showing all |Lots of numbers and readings written |No data |
|Measurements taken during the |data recorded during the exercise |on paper in no particular order, no |No Way! |
|exercise |including units of measure |units of measure | |
|Calculations: (X2) |Mathematical solution to equations in|Answers to calculations without the |No calculations |
|Equations for interpreting your |a sequential order, graph results |equations or solution sequence, |No Way! |
|data |where possible or requested in lab |missing graph, no measurement units | |
| |specifications | | |
|Conclusions: (X2) |Determine percent error where |Answer simple questions about what |No conclusions |
|What does your data show or imply |possible and explain reason, |happened, try to look at the big |No Way! |
| |precision of your data, how is this |picture | |
| |important in the real world | | |
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