MHT CET 2021 23th September Morning Shift | Rotational Motion Question 105 | Physics

A molecule consists of two atoms each of mass '$$m$$' and separated by a distance '$$\mathrm{d}$$'. At room temperature, if the average rotational kinetic energy is '$$E$$' then the angular frequency is

$$\frac{2}{\mathrm{~d}} \sqrt{\frac{\mathrm{E}}{\mathrm{m}}}$$

$$\frac{\mathrm{d}}{2} \sqrt{\frac{\mathrm{m}}{\mathrm{E}}}$$

$$\sqrt{\frac{E d}{m}}$$

$$\sqrt{\frac{m}{E d}}$$

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

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Three solid spheres each of mass '$$M$$' and radius '$$R$$' are arranged as shown in the figure. The moment of inertia of the system about YY' will be

MHT CET 2021 23th September Morning Shift Physics - Rotational Motion Question 90 English

$$\frac{16}{5} \mathrm{MR}^2$$

$$\frac{21}{5} \mathrm{MR}^2$$

$$\frac{7}{5} \mathrm{MR}^2$$

$$\frac{11}{5} \mathrm{MR}^2$$

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

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MHT CET 2021 23th September Morning Shift Physics - Rotational Motion Question 91 English

Figure shows triangular lamina which can rotate about different axes moment of inertia is maximum, about the axis

MHT CET 2021 22th September Evening Shift

MCQ (Single Correct Answer)

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A particle with position vector $$\overrightarrow{\mathrm{r}}$$ has a linear momentum $$\overrightarrow{\mathrm{P}}$$. Which one of the following statements is true in respect of its angular momentum 'L' about the origin?

$$\overrightarrow{\mathrm{L}}$$ acts along $$\overrightarrow{\mathrm{P}}$$.

L is maximum when $$\overrightarrow{\mathrm{P}}$$ is perpendicular to $$\overrightarrow{\mathrm{r}}$$.

$$\overrightarrow{\mathrm{L}}$$ acts along $$\overrightarrow{\mathrm{r}}$$.

L is maximum when $$\overrightarrow{\mathrm{P}}$$ and $$\overrightarrow{\mathrm{r}}$$ are parallel.

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