Gujarati
1.Units, Dimensions and Measurement
hard

एक कण $s$ दूरी $t$ समय में निम्न प्रकार से पूरी करता है $s=u t-\frac{1}{2} g t^2$ कण का प्रारम्भिक वेग $u=1.11 \pm 0.01 \,m / s$ मापा जाता है और प्रयोग में लगा समय अंतराल $t=1.01 \pm 0.1 \,s$ है । यदि त्वरण का मान $g=9.88 {\pm} 0.1 \,m / s ^2$ है, तो इन मापनों के साथ विद्यार्थी कुल दूरी का  ........ $m$ मान आकलित (report) करेगा?

A

$1121 \pm 0.1$

B

$11 \pm 0.1 \,m$

C

$112 \pm 0.07$

D

$11 \pm 0.07$

(KVPY-2017)

Solution

$(b)$ ln multiplication and division number of significant figure in result = smallest number of significant figures (as that of numbers involved in product or division).

In addition and subtraction number of significant figures $=$ smallest number of significant decimal places (as that of numbers used in sum and difference) So, from given data

So, result contains only one digit after decimal.

Standard 11
Physics

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