In a revised set of units

PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

In a revised set of units, the unit of length is larger by 4,%4,\% and the unit of time is smaller by 2,%2,\%, while the unit of mass is unchanged. Approximately what is the percentage change in the numerical value of the velocity of a body measured in the new system? (a) +2.0 %  (increases)+2.0\,\%\;(\text{increases}) (b) −2.0 %  (decreases)-2.0\,\%\;(\text{decreases}) (c) −5.8 %  (decreases)-5.8\,\%\;(\text{decreases}) (d) +6.1 %  (increases)+6.1\,\%\;(\text{increases})

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