Errors & Uncertainties
1. The uncertainty in the value of the momentum of a trolley passing between two points X and Y varies with the choice of measuring devices.
Measurements for the same trolley made by different instruments were recorded.
1 | distance between X and Y using a metre rule with cm divisions = 0.55 m |
2 | distance between X and Y using a metre rule with mm divisions = 0.547 m |
3 | timings using a wristwatch measuring to the nearest 0.5 s at X = 0.0 s and at Y = 4.5 s |
4 | timings using light gates measuring to the nearest 0.1 s at X = 0.0s and at Y = 4.3 s |
5 | mass of trolley using a balance measuring to the nearest g = 6.4 × 10–2 kg |
6 | mass of trolley using a balance measuring to the nearest 10g = 6 × 10–2 kg |
Which measurements, one for each quantity measured, leads to the least uncertainty in the value of the momentum of the trolley?
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