MHT CET 2021 23rd September Evening Shift | Rotational Motion Question 68 | Physics

A metre scale is supported on a wedge at its centre of gravity. A body of weight 'w'. is suspended from the $$20 \mathrm{~cm}$$ mark and another weight of 25 gram is suspended from $$74 \mathrm{~cm}$$ mark balance it and the metre scale remains perfectly horizontal. Neglecting the weight of the metre scale, the weight of the body is

20 gram-wt

15 gram-wt

33 gram-wt

30 gram-wt

MHT CET 2021 23rd September Evening Shift

MCQ (Single Correct Answer)

-0

A body of mass 'm' and radius of gyration 'K' has an angular momentum 'L'. Then its angular velocity is

$$\frac{\mathrm{L}}{\mathrm{mK}^2}$$

$$\frac{\mathrm{mK}^2}{\mathrm{~L}}$$

$$\frac{\mathrm{K}^2}{\mathrm{~mL}}$$

$$\mathrm{mK}^2 \mathrm{~L}$$

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

-0

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)

-0

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

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

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

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

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

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