2.Motion in Straight Line
easy

પદાર્થે $t$ સમયમાં કાપેલું અંતર $s=(2.5) t^2$ છે .$t=5\,s$ સમયે પદાર્થની તત્કાલિન ઝડપ $........\,ms^{-1}$ હશે.

A

$12.5$

B

$62.5$

C

$5$

D

$25$

(JEE MAIN-2023)

Solution

Distance $(s)=(2.5) t^2$

Speed $( v )=\frac{ ds }{ dt }=\frac{ d }{ dt }\left\{(2.5) t ^2\right\}$

$v =5\,t$

At $t =5, v =5 \times 5=25\,m / s$

Standard 11
Physics

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