Recent questions tagged #mcq

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By keeping moment of inertia of a body constant, if we double the time period, then angular momentum of

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

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If frictional force is neglected and girl bends her hand, then (initially girl is rotating on

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

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A wheel of radius `R` rolls on the ground with a uniform velocity `v`. The velocity of topmost point relative to the bottommost point

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

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A drum of radius` R` and mass `M` rolls down without slipping along an inclined plane of angle `theta`. The frictional

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

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Figure shows a composite system of two uniform rods of lengths as indicated. Then the coordinates of the centre of mass of the system of rods are..............

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

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The angular acceleration of a flywheel of mass 5 kg and radius of gyration `0.5 m` is ........... , if a torque of `10N-m` is applied on

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

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A bicycle wheel rolls without slipping on a horizontal floor. Which one of the following statements is true about the motion of points on the rim of the wheel, relative to the axis at the wheel’s

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

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If radius of earth is reduced to half without changing its mass, then match the following columns and choose the correct option from the codes given below. Column I Column II A. Angular momentum of earth p. Will become one fourth B. Time period of rotation of earth q. Will become four times C. Rotational kinetic energy of earth r. No change

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

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A rigid body is rolling without slipping on the horizontal surface, then match the Column I with Column II and choose the correct option from the codes given below. Column I Column II A. Velocity at point `A, i.e. v_A` p.`vsqrt2` B. Velocity at point `B, i.e. v_B` q- zero C. Velocity at point `C, i.e. v_C` r. `v` D. Velocity at point `D, i.e. v_D` s. `2v`

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

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Assertion: The motion of the centre of mass describes the translational part of the motion. Reason: Translational motion always means straight line

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

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Assertion: The centre of mass of a body must lie on the body. Reason: The centre of mass of a body does not lie at the geometric centre of

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

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Assertion: Two identical spherical spheres are half filled with two liquids of densities `rho_1 and rho_2 ( > rho_1)`. The centre of mass of both the spheres lie at same level.Reason: The centre of mass does not lie at centre of the

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

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Assertion: If a particle moves with a constant velocity, then angular momentum of this particle about any point remains constant. Reason: Angular momentum does not have the units of Planck’s

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

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Assertion: When a particle is moving in a straight line with a uniform velocity, its angular momentum is constant. Reason: The angular momentum is non-zero, when particle moves with a uniform

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

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Assertion: For a system of particles under central force field, the total angular momentum is conserved. Reason: The torque acting on such a system is

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

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Assertion: Inertia and moment of inertia are not same quantities. Reason: Inertia represents the capacity of a body that does not oppose its state of motion or

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

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Assertion: Moment of inertia of a particle is different whatever be the axis of rotation. Reason: Moment of inertia does not depends on mass and distance of the particle from the axis of

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

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Assertion: The angular velocity of a rigid body in motion is defined for the whole body. Reason: All points on a rigid body performing pure rotational motion are having same angular

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

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Assertion: If bodies slide down an inclined plane without rolling, then all bodies reach the bottom simultaneously is not necessary. Reason: Acceleration of all bodies are equal and independent of the

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

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Assertion: A solid sphere cannot roll without slipping on smooth horizontal surface. Reason: If the sphere is left free on smooth inclined surface, it can roll without

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

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