MHT CET 2021 23th September Morning Shift | Rotational Motion Question 71 | Physics

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 57 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 58 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.

MHT CET 2021 22th September Evening Shift

MCQ (Single Correct Answer)

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A child is standing with folded hands at the centre of the platform rotating about its central axis. The kinetic energy of the system is '$$K$$'. The child now stretches his arms so that the moment of inertia of the system becomes double. The kinetic energy of the system now is

$$\frac{K}{2}$$

$$2 \mathrm{~K}$$

$$4 \mathrm{~K}$$

$$\frac{\mathrm{K}}{4}$$

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