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Hindi
6.System of Particles and Rotational Motion
easy

જો કુલ ગતિ ઊર્જાનો $50\%$ ચાક ગતિ ઊર્જા હોય તો તે પદાર્થ .......... છે.

A

રિંગ

B

નળાકાર

C

પોલો ગોળો

D

ધન ગોળો

Solution

clearly, rotational kinetic energy $=$ translational kinetic energy (Given).

$\Rightarrow \frac{1}{2} I \omega^2=\frac{1}{2} mv ^2$

$\left.\Rightarrow \quad I \times \omega^2= m \times \omega^2 r ^2 \quad \text { (As, } V =\omega r \right)$

$\therefore \quad I = mr ^2$

Thus, body will be a ring.

Standard 11
Physics

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