Physics 9702 · AS & A Level · Errors and uncertainties

Errors and uncertainties — practice question

A man with a mass of $75.2\,\text{kg}$ uses a set of weighing scales to find his mass three times. The results are: reading 1: $80.2\,\text{kg}$ reading 2: $80.1\,\text{kg}$ reading 3: $80.2\,\text{kg}$. Which statement most suitably describes the precision and accuracy of the weighing scales?

  • Anot precise to $\pm 0.1\,\text{kg}$ and accurate to $\pm 0.1\,\text{kg}$
  • Bnot precise to $\pm 0.1\,\text{kg}$ and not accurate to $\pm 0.1\,\text{kg}$
  • Cprecise to $\pm 0.1\,\text{kg}$ and accurate to $\pm 0.1\,\text{kg}$
  • Dprecise to $\pm 0.1\,\text{kg}$ and not accurate to $\pm 0.1\,\text{kg}$

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