contexts: A speedometer or a speed meter is a gauge that measures and displays the instantaneous speed of a vehicle . Now universally fitted to motor vehicles , they started to be available as options in the 1900s , and as standard equipment from about 1910 onwards . Speedometers for other vehicles have specific names and use other means of sensing speed . For a boat , this is a pit log . For an aircraft , this is an airspeed indicator .
name: Speedometer
answers.input_text: short
answers.span_text: the instantaneous speed of a vehicle
questions.input_text: what type of speed does a speedometer measure