Final answer:
The device that automatically activates brake sensors if a wheel begins spinning while the driver is accelerating is called theanti-lock braking system (ABS). It is a safety feature in modern vehicles that prevents the wheels from locking up during braking.
Step-by-step explanation:
In Physics, the device that automatically activates brake sensors if a wheel begins spinning while the driver is accelerating is called the anti-lock braking system (ABS).
The ABS is a safety feature in modern vehicles that prevents the wheels from locking up and losing traction during braking. It uses sensors to detect if a wheel is spinning too fast compared to the others and automatically modulates the braking pressure to that specific wheel. This allows the driver to maintain steering control and reduce the stopping distance.
For example, if a car's ABS detects that the rear left wheel is spinning faster than the other wheels, it will apply brake pressure to that wheel to slow it down, preventing it from losing traction and enabling the driver to maintain control of the vehicle.