TECHNOLOGY-BASED LAB ACTIVITIES

12. To test your prediction, choose a starting position and hold the cardboard at
that point. Start data collection by pressing e. When you hear the
motion detector begin to click, move the cardboard in such a way that the
graph of the cardboard’s motion matches the target graph on the calculator
screen. Be careful not to trip or bump into anyone or anything as you move.
13. If you were not successful, repeat step 12 until the graph of the cardboard’s
motion closely matches the graph on the screen. To repeat with the same
graph, press e and select SAME MATCH from the OPTIONS menu. Sketch
the graph with your best attempt.
14. Perform a second distance graph match (steps 10–12) by pressing e and
selecting NEW MATCH from the OPTIONS menu.
15. Perform steps 4–8 of the Analysis (on page 5) before proceeding to Part III
of the Procedure.
Part IIl Velocity-Time Graph Matching
16. Now you will test the use of velocity-time graphs to convey information
about the movement of a robotic arm. The PHYSICS application can generate
velocity-time graphs similar to the one shown below. The graph your
calculator generates will probably have a different curve.
• Select RETURN TO MAIN from the OPTIONS menu.
• Select COLLECT DATA from the MAIN MENU.
• Select GRAPH MATCH from the DATA COLLECTION menu.
• Select VELOCITY MATCH from the GRAPH MATCH menu.
• Note the screen instructions, and press e.
17. Sketch a copy of the graph on your calculator screen. The vertical axis
(velocity) runs from –0.5 to +0.5 m/s, and the horizontal axis (time) runs
from 0 to 10 s. Write down how the robotic arm would have to move to produce
this target graph.
18. To test your prediction, choose a starting position and hold the cardboard at
that point. Start data collection by pressing e. When you hear the
motion detector begin to click, move the cardboard so that the graph of the
cardboard’s motion matches the target graph on the calculator screen. Be
careful not to trip or bump into anyone or anything as you move.
19. If you were not successful, repeat step 18 until the motion of the cardboard
closely matches the graph on the screen. To repeat with the same graph,
press e and select SAME MATCH. Sketch the graph with your best
attempt.
20. Perform a second velocity graph match (steps 16–18) by pressing e and
selecting NEW MATCH from the OPTIONS menu.
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4 HOLT PHYSICS Technology-Based Lab Activities