6.System of Particles and Rotational Motion
hard

$5 \mathrm{~kg}$ દળ ધરાવતો પદાર્થ $3 \sqrt{2} \mathrm{~ms}^{-1}$ ની સમાન ઝડપ સાથે $X-Y$ સમતલમાં $y=x+4$ રેખાની દિશામાં ગતિ કરે છે. ઉગમબિંદુને અનુલક્ષીને કણનું કોણીય વેગમાન__________$\mathrm{kg} \mathrm{m}^2 \mathrm{~s}^{-1}$ થશે.

A

$45$

B

$60$

C

$75$

D

$12$

(JEE MAIN-2024)

Solution

$y-x-4=0$

$d_1$ is perpendicular distance of given line from origin.

$\mathrm{d}_1=\left|\frac{-4}{\sqrt{1^2+1^2}}\right| \Rightarrow 2 \sqrt{2} \mathrm{~m}$

So $|\overrightarrow{\mathrm{L}}|=\operatorname{mvd}_1  =5 \times 3 \sqrt{2} \times 2 \sqrt{2} \mathrm{~kg} \mathrm{~m}^2 / \mathrm{s} $

$ =60 \mathrm{~kg} \mathrm{~m}^2 / \mathrm{s}$

Standard 11
Physics

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