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Accuracy; precision of instruments and errors in measurements

Question

During measurement of kinetic energy , the percentage error in measurement of mass of particle and momentum of particle are 2% and 3%, respectively. The percentage error in measurement of kinetic energy is ________________.

Easy
Solution

Let Kinetic energy be T, then

T=p22m or ΔTT=2Δpp+Δmm

Percentage error in kinetic energy is

 =2×2+3=7% n=7

 



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