A button battery is rated 3 ,V and 225 ,mAh. | vedclass

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(D) The energy stored in the battery is given by $E = V 	imes I 	imes t$.Given $V = 3 \,V$ and $I 	imes t = 225 \,mAh = 225 	imes 10^{-3} \,A 	im

Vedclass · Accepted Answer

$170$

Vedclass · Answer

(D) The energy stored in the battery is given by $E = V 	imes I 	imes t$.Given $V = 3 \,V$ and $I 	imes t = 225 \,mAh = 225 	imes 10^{-3} \,A 	imes 3600 \,s = 810 \,C$.Thus,$E = 3 \,V 	imes 810 \,C = 2430 \,J$.For the cricket ball,the kinetic energy is $K.E. = \frac{1}{2} mv^2$.Equating the energy: $2430 = \frac{1}{2} 	imes 0.163 \,kg 	imes v^2$.$v^2 = \frac{2430 	imes 2}{0.163} \approx 29816$.$v = \sqrt{29816} \approx 172.67 \,m/s$.This value is closest to $170 \,m/s$.

$A$ button battery is rated $3 \,V$ and $225 \,mAh$. $A$ cricket ball (mass $= 0.163 \,kg$) having energy equal to that stored in the battery will have a speed closest to ............ $\,m/s$.

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