Age Range: 11 – 14 years old
Students will investigate the freefall of a dropped object by combining classic science educational equipment with digital technology. Students will work in groups of 2 or 3 and will record the data using iLOG.
- To understand how a dropped object freefalls over time.
- To learn how to use data logging equipment.
- To record and save data.
Kit Required for the Sensor
- Battery pack
- 2 x AAA Batteries
- MicroUSB Cable
- Bubble Wrap
- Duct Tape
- Tape Measure
- Soft landing area
WHEN CONDUCTING THIS EXPERIMENT ENSURE APARATUS IS SECURE AND ANY DROPPED OBJECTS ARE SAFELY CONTAINED TO AVOID DAMAGING EQUIPMENT.
- Insert 2 x AA Batteries into the Battery Pack ensuring correct alignment.
- Connect the micro:bit to the Battery Pack.
- Ensure the device is on and receiving power.
Getting iLOG Ready
- If this is your first time using iLOG then we recommend following our Guide to setup the micro:bit for logging activities.
- Once the micro:bit is setup in step 1 you can now configure the datalogging settings.
- First you need to select Collecting Data. We are telling iLOG and the micro:bit we wish to gather data from them.
- Then Select Remote Logging. This allows us to log remotely from the micro:bit powered by the Battery Pack.
- Now we need to select the sensor we have connected.
- Click on the Sensors Box. This will open a new popup window.
- Tick Sensor One and in the dropdown select Acceleration (milli-g).
- Now we need to set how long we want to log for.
- For this experiment we selected 2 Seconds as the time may vary depending on your equipment.
- Now all the configuring is done its time to click Ready.
- Use the illustration to set up the apparatus.
- For securing the micro:bit and battery pack use bubble wrap or a suitable alternative and an adhesive component such as Duct Tape.
- Ensure that the wrapping around the micro:bit does not obstruct your access to the micro:bit reset button.
- Ensure that the wrapping around the micro:bit does not obstruct your access to the micro:bit “a” button.
- Ensure that the freefall landing area is not obstructed.
- Ensure that the micro:bit is dropped from a fixed height of no less than 1m (use the tape measure to obtain a consistent height for each attempt).
- Ensure that the dropped micro:bit does not fall directly onto a hard surface by placing a Soft object such as a pillow in the freefall landing area.
Now you should have everything setup and ready to go. Below is a check list make sure you are happy and have everything ready to go.
- Micro:bit setup with Battery Pack connected.
- Access to the micro:bit “a” and reset buttons.
- iLOG on its main graphing screen with Remote Logging configured.
- Apparatus setup as per the diagram.
- A suitably contained freefall landing area.
If the above points are all done, then Datalogging can begin.
- Press the micro:bit “a” button to begin logging.
- You will start to see plots appear on the graph.
- You will also see its current G reading appear in the bottom right.
- If it is plotting data and displaying the current distance value should be no less than 1000 milli-g.
- Prepare to release the micro:bit quickly from the measured height of >1m once logging has begun.
- Release the micro:bit.
- Once the micro:bit has come to a stop ensure that you click stop in iLOG if logging has not ended in time.
Taking it Further
- Conduct an investigation into the effects of variable distance into the acceleration of a freefalling object.
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