Question

What are the speedometer and odometer?

Answer 1

Definition

1. A speedometer is a device in automobiles that monitors the vehicle's speed directly in $\mathrm{kilometers}\mathrm{per}\mathrm{hour}$.
2. The vehicle's odometer indicates the distance traveled (moving).

Speedometer

The speedometer's speed-indicating technology would be operated by around permanent magnet that would be turned or cycled 1,000 revolutions every mile of road transportation by either a flexible shaft controlled by gearing at the transmission's rear.

1. The magnet rotates within a moveable metal cup constructed of light nonmagnetic metal and coupled to the shafts holding the signaling pointers; the magnetic circuit would be concluded by a circular stationary field plate around the moving cup.
2. As the magnet revolves, a magnetic drag is exerted on the moveable cup, tending to rotate itself against the constraint of a spiral spring. The stronger the force on the cup as well as the pointer, the quicker the magnet revolves.

Odometer

An odometer would be a device used to calculate the distance traveled by a vehicle. The odometer is normally seen on the dashboard of a car.

1. Digital odometers differentiate from mechanical odometers in that they measure mileage using a computer chip. The current mileage will be shown digitally.
2. A trip meters or trip odometer might be installed on a vehicle. The trip odometer, however unlike the ordinary odometer, could be refreshed at any time.

Therefore, the speedometer dial is measured either in that $\mathrm{mile}\mathrm{per}\mathrm{hour}$as well as $\mathrm{kilometers}\mathrm{per}\mathrm{hour}$ or perhaps in some versions. People who build roads as well as evaluate land also use odometers.