Question

what does the speedometer of a car measure

Answer 1

It measure the speed and distance travelled by the car

Answer 2

Speedometer, a tool that displays a car's speed in conjunction with an odometer, a gadget that keeps track of the distance traveled.

About Speedometer:

• A speedometer, often known as a speed meter, is a gauge that calculates and shows the current speed of a moving object.
• They began to be offered as choices in the early 20th century and became standard equipment starting around 1910. Today, they are fitted to all motor vehicles.
• An early speedometer, which was typically mounted to locomotives, is credited to Charles Babbage.
• Josip Belušić, a Croatian, created the electric speedometer in 1888; it was first known as a velocimeter.
• A flexible rotating cable that is operated by gearing connected to the vehicle's transmission is commonly used as a speedometer.
• However, a cable-driven from a front wheel is used by numerous motorbikes and early models of the Volkswagen Beetle.
• Electronic speedometers are widely used today.
• In systems based on older eddy-current models, a rotation sensor located in the gearbox sends out a series of electrical pulses whose frequency relates to the driveshaft's (average) rotational speed and, consequently, the vehicle's speed, provided the wheels have full traction.
• A set of one or more magnets installed on the output shaft, a differential crown wheel (in transaxles), or a toothed metal disc sandwiched between a magnet and a magnetic field sensor commonly make up the sensor.
• The magnets or teeth pass beneath the sensor while the component in question rotates, each time causing a pulse in the sensor as they change the strength of the magnetic field it is monitoring.

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