2.Motion in Straight Line
easy

કણ $x = a + b{t^2}$ મુજબ ગતિ કરે જયાં $a=15\,cm$ અને $b=3\,cm$ તો $t=3\,sec$ કણ નો વેગ કેટલો ..........$cm/sec$ થાય?

A

$36$

B

$18$

C

$16$

D

$32$

Solution

(b) $x = a + b{t^2},\;v = \frac{{dx}}{{dt}} = 2bt$

Instantaneous velocity $v = 2 \times 3 \times 3 = 18\;cm/\sec $

Standard 11
Physics

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