Recent questions tagged #mcq

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The angular momentum L of a single particle can be represented

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Newton’s second law for rotational motion of a system of particle can be represented as (L for a system of

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A particle of mass `m` moves in the `xy`-plane with a velocity `v` along the straight line AB. If the angular momentum of the particle with respect to origin `O` is `L_A`, when it is at A and `L_B` when it is at B,

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A point mass `m` is attached to a massless string whose other end is fixed at `P` as shown in figure. The mass is undergoing circular motion in `xy`-plane with centre `O` and constant angular speed `Omega`. If the angular momentum of the system, calculated about `O and P` be `L_O and L_P` respectively,

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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If the torque of the rotational motion will be zero, then the constant quantity will

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A rigid body is said to be in partial equilibrium only,

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In the game of see-saw, what should be the displacement of boy B from right edge to keep the see-saw in equilibrium? (Given, `M_1 = 40 kg and M_2 = 60

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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The centre of gravity of a homogeneous body is the point at which the

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One solid sphere A and another hollow sphere B are of same mass and same outer radius. Their moments of inertia about their diameters are `I_A and I_B` respectively, such

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A disc of mass M and radius R is rotating about one of its diameter. The value of radius of gyration for the disc

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A rod is rotating about an axis passing through its centre and perpendicular to its length.The radius of gyration for the rod

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A wheel is rotating at 900 rpm about its axis. When the power is cut-off, it comes to rest in 1 min. The angular retardation (in rad `s^(-2)`)

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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If object starts from rest and covers angle of 60 rad in 10 s in circular motion, then magnitude of angular acceleration will

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When a ceiling fan is switched OFF, its angular velocity fall to half while it makes 36 rotations. How many more rotations will it make before coming to rest? (Assume uniform angular

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A disc is rotating with angular velocity `omega`. A force `F` acts at a point whose position vector with respect to the axis of rotation is `r`. The power associated with torque due to the force is given

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A flywheel of moment of inertia `0.4 kg-m^2` and radius `0.2 m` is free to rotate about a central axis. If a string is wrapped around it and it is pulled with a force of 10N, then its angular velocity after `4s` will

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Two discs having mass ratio (1/2) and diameter ratio (2/1), then find ratio of moment of

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A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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A body having a moment of inertia about its axis of rotation equal to `3 kg-m^2` is rotating with angular velocity of `3 rad s^(-1)`. Kinetic energy of this rotating body is same as that of a body of mass 27 kg moving with a velocity `v`. The value of `v`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Two bodies have their moments of inertia `I and 2I` respectively about their axis of rotation. If their kinetic energies of rotation are equal, their angular momenta will be in the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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