AI Tutor
Human reaction time is about 0.20Β seconds0.20\text{ seconds}β€”a delay long enough to introduce massive error when timing a fast-moving cart or a brief collision.
To capture rapid physical events with high precision, scientists use data acquisition (DAQ) systems that measure and record hundreds of quantitative data points every second.
How do physical events like movement, force, or temperature actually turn into numbers and live graphs on a screen?

The Data Acquisition Chain

Every electronic measurement setup follows a three-part chain: a sensor, an interface, and data logging software.
The sensor converts a physical quantity (like position or pressure) into an electrical voltage, and the interface uses an analog-to-digital converter (ADC) to turn that continuous voltage into discrete numerical values for the software.
How often should your interface take these digital snapshots during an experiment?

Sampling Rate and Signal Quality

The sampling rate is the number of measurements a sensor records per second, measured in hertz (Hz) or samples per second.
If your sampling rate is too low, you risk under-sampling, missing sharp peaks during sudden events like bounces or impacts.