Equipment:

Ramp Torch LogIT or other data logger connected to computer. Car Black card

For this investigation the logIT is connected to the computer at all times.

Instructions:

Layout the investigation.

Attach a 10 cm piece of black card to the car.

Point the light sensor, Sensor 2, at the torch on the opposite side of the ramp.

When the car 'breaks' the beam the speed in m/s will be displayed.

Connect the datalogger to the laptop, using the white USB cable supplied.

Setting up the software

Open the Logit software

Click on 'Timing'.

Select 'speed' and press 'Next'.

Make sure 'Time at any sensor' is selected and click 'Next.

Deselect Auto repeat to stop the computer automatically keep taking readings and click ' Next'.

Ensure that the length is set to 10 cm and press 'Next'.

Click on 'Finish to start logging

The program is now set to start logging.

You can choose whether you display the table of results or the graph .

Displaying the Graph

• Make sure that sensor 2, on the logIT and the torch are lined up.
• Attach the 10 cm black card to the car making sure it is on the same side as the logIT.
• Switch the torch on.
• Put the car on the start line on the ramp.
• Press 'Start' to take a reading, the green circle on the Toolbar. The square next to the green circle will go red on the tool bar.

• Let go of the car - DO NOT PUSH IT
• The speed of the car will be recorded on the bar chart.

• Repeat for different surfaces.

You can look at the table of results by clicking on 'Display Table' button.

The table of results will be displayed.

Table of Results	Close up of results