MCQ
A body travels uniformly a distance of $ (13.8 \pm 0.2)\,m$ in a time $(4.0 \pm 0.3)\, s$. The percentage error is ......... $\%$
- A$7$
- B$5.95$
- ✓$8.95$
- D$9.85$
✓
Answer
Correct option: C.
$8.95$
c
(c) $\%$ error in velocity$ = \%$ error in $L + \%$ error in $t$
(c) $\%$ error in velocity$ = \%$ error in $L + \%$ error in $t$
$ = \frac{{0.2}}{{13.8}} \times 100 + \frac{{0.3}}{4} \times 100$
$= 1.44 + 7.5 = 8.94 \%$
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