* Speed is a measure of how fast an object is moving.

* Speedometer is a device that measures the instantaneous speed of a vehicle.

If the speedometer is consistently showing 60 km/hr, it means the car is moving at a constant rate of 60 kilometers every hour.

Important Note: While the speedometer indicates speed, it doesn't tell you the velocity. Velocity includes both speed and direction. A car moving at a constant 60 km/hr in a circle would have a constant speed but changing velocity.