Download App

Rotational Dynamics — Physics STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 SciencePhysicsRotational Dynamics3 Marks
Question
A solid sphere of diameter \(50 cm\) and mass \(25 kg\) rotates about an axis through its centre. Calculate its moment of inertia. If its angular velocity changes from \(2 rad / s\) to \(1 rad / s\) in 5 seconds, calculate the torque applied.
✓

Answer

I \(=0.625 kg \cdot m ^2 ; \tau=1.25 N \cdot m\)

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following in Brief" from Rotational Dynamics→Rotational Dynamics — all question types→Physics STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

Find the kinetic energy per molecule of a diatomic gas at $300 \mathrm{~K}$.
→
The refractive indices of glass and water w.r.t. air \(\frac{3}{2}\) and \(\frac{4}{3}\) respectively. Determine the refractive index of glass w.r.t. water.
→
A horizontal disc is freely rotating about a transverse axis passing through its centre at the rate of 100 revolutions per minute. A 20 gram blob of wax falls on the disc and sticks to the disc at a distance of \(5 cm\) from its axis. Moment of inertia of the disc about its axis passing through its centre of mass is \(2 \times 10^{-4} kg m ^2\). Calculate the new frequency of rotation of the disc.
→
Explain the working of P-N junction diode in forward and reverse biased mode.
→
Describe Young’s double-slit experiment with a neat diagram showing points of maximum and minimum intensity.
→
If the refractive index of glass is $3 / 2$ and that of water is $4 / 3$ respectively, find the speed of light in glass and in water.
→
What do you do if your vehicle is trapped on a slippery or sandy road? What is the physics involved?
→
A uniform wire under tension is fixed at its ends. If the ratio of the tension in the wire to the square of its length is $360 dyn / cm ^2$ and the fundamental frequency of vibration of the wire is $300 Hz$, find its linear density.
→
State the two forms of the second law of thermodynamics.
→
Two wires of the same material and same cross-section are stretched on a sonometer. One wire is loaded with $1\ kg$ and another is loaded with $9\ kg.$ The vibrating length of the first wire is $60\ cm$ and its fundamental frequency of vibration is the same as that of the second wire. Calculate the vibrating length of the other wire.
→