2. Name the instrument used to measure the following:-
(a) Speed in an automobile- Speedometer
(b) Distance travelled by an automobile- Odometer.
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(a) The speed-indicating mechanism of the speedometer is actuated by a circular permanent magnet that is rotated 1,000 revolutions per mile of vehicle travel by a flexible shaft driven by gears at the rear of the transmission.
(b) Answer: An Odometer or odograph is an instrument used for measuring the distance travelled by a vehicle, such as a bicycle or car. Answer: Just like on a cycle one rotation on the wheel gives u an idea of distance travelled =2 pi r, r=radius of wheel.
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