Question

A car speedometer has a 6% uncertainty what is the range of possible speeds when it reads 50 km an hour

Answer 1

reading of speedometer= 50 km/h

Uncertainty = 6%

6% of 50km/h = 50 × 6/100 = 3 km/h

The error can be positive or negative.

So the range of speed will be from (50 -3) km/h to (50+3) km/h.

Hence range of speed is 47 km/h to 53 km/h.

Answer 2

Hey !

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Markings made by Speedometer

• (106.7) (95.6) (46.210) (1.01)

• (18.7)²

• (1.60 ✕ 10-19) (3712)

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Thanks !