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Question

What is a Speedometer? How does it work? [3 MARKS]

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Solution

Definition: 1 Mark
Working: 2 Marks

A speedometer is a device that measures the speed of a particular vehicle at that particular instant.

The speedometer calculates the speed of the vehicle at a particular instant by measuring the time it takes for the wheels of the vehicle to rotate. Since the distance moved in each rotation is constant, knowing the time it takes for one rotation gives us the speed.

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