First slide

Accuracy; precision of instruments and errors in measurements

Question

Percentage error in the measurement of mass and speed are $2 % a n d 3 %$ , respectively. The error in the measurement of kinetic energy obtained by measuring mass and speed will be

Moderate

A

12%
B

10%
C

8%
D

5%

Solution

$K = \frac{1}{2} m v^{2}$
$% error in K = (% error in m) + 2 (% error in v)$

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