An engineer investigates how the angle of inclination of a magnetic levitation track affects the time taken for a high-precision sled to travel a distance of 0.35 m.
The engineer has two methods available to measure this travel time:
- Use a manual handheld stopwatch.
- Use high-speed infrared barrier sensors connected to an electronic micro-controller.
The engineer chose to use the electronic infrared barrier sensors.
Explain why this choice was correct.
You should refer to the values on the time axis of Figure 1 in your answer.
