Chapter 9 – Rotation
A flywheel rotates with a uniform angular acceleration. Its angular velocity increases from 20πrad/s to 40πrad/s in 10 seconds. How many rotations did it make in this period ?
30
Oct
A flywheel rotates with a uniform angular acceleration. Its angular velocity increases from 20πrad/s to 40πrad/s in 10 seconds. How many rotations did it make in this period ? A flywheel rotates with a uniform angular acceleration. Its angular velocity increases from 20πrad/s to 40πrad/s in 10 seconds. How many rotations did it make in [...]
When a ceiling fan is switched on, it makes 10 revolutions in the first 3 seconds. Assuming a uniform angular acceleration, how many rotation it will make in the next 3 seconds?
30
Oct
When a ceiling fan is switched on, it makes 10 revolutions in the first 3 seconds. Assuming a uniform angular acceleration, how many rotation it will make in the next 3 seconds? how many rotation it will make in the next 3 seconds? it makes 10 revolutions in the first 3 seconds. Assuming a uniform [...]
A string is wound round the rim of a mounted flywheel of mass 20kg and radius 20cm. A steady pull of 25N is applied on the cord. Neglecting friction and mass of the string, the angular acceleration of the wheel is
30
Oct
A string is wound round the rim of a mounted flywheel of mass 20kg and radius 20cm. A steady pull of 25N is applied on the cord. Neglecting friction and mass of the string, the angular acceleration of the wheel is A string is wound round the rim of a mounted flywheel of mass 20kg [...]
A constant torque of 31.4 N−m is exerted on a pivoted wheel. If angular acceleration of wheel is 4π rad/s^2, then the moment of inertia of the wheel is
30
Oct
A constant torque of 31.4 N−m is exerted on a pivoted wheel. If angular acceleration of wheel is 4π rad/s^2, then the moment of inertia of the wheel is A constant torque of 31.4 N−m is exerted on a pivoted wheel. If angular acceleration of wheel is 4π rad/s^2 then the moment of inertia of [...]
A hollow cylinder of mass M and radius R is rotating about its axis of symmetry and a solid sphere of same mass and radius is rotating about an axis passing through its centre. If torques of equal magnitude are applied to them, then the ratio of angular accelerations produced is
30
Oct
A hollow cylinder of mass M and radius R is rotating about its axis of symmetry and a solid sphere of same mass and radius is rotating about an axis passing through its centre. If torques of equal magnitude are applied to them, then the ratio of angular accelerations produced is 1) is: A force [...]
If the frequency of the rotating platform is f and the distance of a boy from the centre is r what is the area swept out per second by line connecting the boy to the centre ?
30
Oct
If the frequency of the rotating platform is f and the distance of a boy from the centre is r what is the area swept out per second by line connecting the boy to the centre ? If the frequency of the rotating platform is f and the distance of a boy from the centre [...]
A rope of negligible mass is wound round a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N? Assuming that there is no slipping.
30
Oct
A rope of negligible mass is wound round a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N? Assuming that there is no slipping. 1) is: A force of -F k acts on O the [...]
The moment of inertia of a rod about an axis through its centre and perpendicular to it, is 1/12 ML^2 (where, M is the mass and L is length of the rod). The rod is bent in the middle, so that two halves make an angle of 30^∘. The moment of inertia of the bent rod about the same axis would be
30
Oct
The moment of inertia of a rod about an axis through its centre and perpendicular to it, is 1/12 ML^2 (where, M is the mass and L is length of the rod). The rod is bent in the middle, so that two halves make an angle of 30^∘. The moment of inertia of the bent [...]
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is 1/12 ML^2 (where ,
M is the mass and L is length of the rod). The rod is bent in the middle ,
so that two halves make an angle of 30^∘. The moment of inertia of the bent rod about the same axis would be ,
The moment of inertia of a rod about an axis through its centre and perpendicular to it ,
In the rectangular lamina shown in the figure, AB = BC/2. The moment of inertia of the lamina is minimum along the axis passing through
30
Oct
In the rectangular lamina shown in the figure, AB = BC/2. The moment of inertia of the lamina is minimum along the axis passing through AB = BC/2. The moment of inertia of the lamina is minimum along the axis passing through In the rectangular lamina shown in the figure October 30, 2020 Category: Chapter [...]
Three thin uniform rods each of mass M and length L are placed along the three axis of a cartesian coordinate system. The moment of inertia of the system about z-axis is-
30
Oct
Three thin uniform rods each of mass M and length L are placed along the three axis of a cartesian coordinate system. The moment of inertia of the system about z-axis is- Three thin uniform rods each of mass M and length L are placed along the three axis of a cartesian coordinate system. The [...]