Math/Physical Science Slope Lab
by Professor Rich Born
The PocketLab Voyager/intelino smart train Slope Lab
Figure 1 - PocketLab measuring wheel hitching a ride with intelino
Figure 2 shows an example setup for the intelino/Voyager slope lab. This example has been designed to illustrate for the teacher a number of things that can be done with the intelino color snap commands. In the next section of this lesson, a progression of suggested activities are described that vary in complexity as students progress from grades 7 through 9.
The track layout of the example setup of Figure 2 consists of 12 straight tracks. The intelino engine/Voyager are started at the far left end of the track with an initial speed of "slow" (30 cm/s) using the intelino app in autopilot mode. When intelino/Voyager reach the custom color snap (white/magenta/green), the speed changes to 70 cm/s. Upon reaching the built-in command "stop 5 sec" (white/red/red), intelino/Voyager pause for 5 seconds. After the pause, the custom action color snap command (white/magenta/red) sets the speed to 50 cm/s. The built-in command "reverse" (white/blue) causes the engine to reverse its direction, after which it moves all the way back to the starting location at 50 cm/s. The built-in "end route" color snap command (white/red/blue) stops the engine. During the entire process Voyager collects position and velocity versus time data.
Figure 2 - Setup for the intelino/Voyager slope lab
The short 19-second video below shows a typical run of the intelino/Voyager slope lab.
Figure 3 - Position and velocity vs. time graphs for the example setup of Figure 2
Student Activity Progression
Activity #1: Constant Speed
Figure 4 - Activity #1 position and velocity vs. time graphs
Activity #2: Constant Speed with a 2-second Stop Mid-Route
Intelino/Voyager are started at the left end of the track at the intelino "fast" speed (60 cm/s) in autopilot mode. There is a "stop 2-sec" color snap (white/red) command at the middle of the track and an "end route command" (white/red/blue) near the far right end of the track. Figure 5 shows the corresponding position and velocity vs. time graphs from the VelocityLab app.
Figure 5 - Activity #2 position and velocity vs. time graphs
Activity #3: Constant Speed Forward and Backward
Figure 6 - Activity #3 position and velocity vs. time graphs
Activity #4: Constant Speed with 2-second Mid-Route Stops Both Forward and Backward
Figure 7 - Activity #4 position and velocity vs. time graphs
Activity #5: Mid-Route Speed Change
Intelino/Voyager are started at the left end of the track at the intelino "fast" speed (60 cm/s) in autopilot mode. At mid-route the speed is manually changed to "slow" (30 cm/s) with the autopilot mode of the intelino app. The only color snap command is an "end route" command (white/red/blue) at the far right end of the track. Figure 8 shows the corresponding position and velocity vs. time graphs from the VelocityLab app.
Figure 8 - Activity #5 position and velocity vs. time graphs
Activity 6: Setting Speeds with Custom Color Action Snaps
Figure 9 - Activity #6 position and velocity vs. time graphs
Activity #7: Performing the Setup Shown in Figure 2
This final activity combines everything that you learned from the first six activities into a single run. Figure 2 shows the setup and Figure 3 shows the position and velocity versus time graphs.