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Why does a solid sphere have smaller moment of inertia than a hollow cylinder of same mass and radius, about an axis passing through their axes of symmetry ?
27
Nov
Why does a solid sphere have smaller moment of inertia than a hollow cylinder of same mass and radius, about an axis passing through their axes of symmetry ? about an axis passing through their axes of symmetry ? Why does a solid sphere have smaller moment of inertia than a hollow cylinder of same [...]
With reference to Fig. of a cube of edge a and mass m, state whether the following are true or false. (O is the centre of the cube.)
27
Nov
With reference to Fig. of a cube of edge a and mass m, state whether the following are true or false. (O is the centre of the cube.) state whether the following are true or false. (O is the centre of the cube.) With reference to Fig. of a cube of edge a and mass [...]
Figure shows a lamina in x−y plane. Two axes z and z’ pass perpendicular to its plane. A force F acts in the plane of lamina at point P as shown. Which of the following statements are true ? (The point P is closer to z’−axis than the z-axis).
27
Nov
Figure shows a lamina in x−y plane. Two axes z and z’ pass perpendicular to its plane. A force F acts in the plane of lamina at point P as shown. Which of the following statements are true ? (The point P is closer to z’−axis than the z-axis). Which of the following points is [...]
The net external torque on a system of particles about an axis is zero. Which of the following are compatible with it?
27
Nov
The net external torque on a system of particles about an axis is zero. Which of the following are compatible with it? The net external torque on a system of particles about an axis is zero. Which of the following are compatible with it? November 27, 2020 Category: Chapter 6 - System of Particles and [...]
A uniform square plate has a small piece Q of an irregular shape removed and glued to the centre of the plate leaving a hole behind in figure. The moment of inertia about the z-axis is then,
27
Nov
A uniform square plate has a small piece Q of an irregular shape removed and glued to the centre of the plate leaving a hole behind in figure. The moment of inertia about the z-axis is then, A uniform square plate has a small piece Q of an irregular shape removed and glued to the [...]
When a disc rotates with uniform angular velocity, which of the following is not true ?
27
Nov
When a disc rotates with uniform angular velocity, which of the following is not true ? When a disc rotates with uniform angular velocity which of the following is not true ? November 27, 2020 Category: Chapter 6 - System of Particles and Rotational Motion , NCERT Exemplar Class 11 , Physics ,
A particle of mass m is moving in YZ-plane with a uniform velocity v a with its trajectory running parallel to + ve Y-axis and intersecting Z-axis at z = an in a figure. The change in its angular momentum about the origin it bounces elastically from a wall at y = constant
27
Nov
A particle of mass m is moving in YZ-plane with a uniform velocity v a with its trajectory running parallel to + ve Y-axis and intersecting Z-axis at z = an in a figure. The change in its angular momentum about the origin it bounces elastically from a wall at y = constant Which of [...]
Which of the following points is the likely position of the centre of mass of the system shown in Fig.
27
Nov
Which of the following points is the likely position of the centre of mass of the system shown in Fig. Which of the following points is the likely position of the centre of mass of the system shown in Fig. November 27, 2020 Category: Chapter 6 - System of Particles and Rotational Motion , NCERT [...]
A cylinder of mass 10 kg and radius 15 cm is rolling perfectly on a plane of inclination 30^o . The coefficient of static friction μs = 0.25. (a) How much is the force of friction acting on the cylinder ? (b) What is the work done against friction during rolling ? (c) If the inclination θ of the plane is increased, at what value of θ does the cylinder begin to skid, and not roll perfectly ?
27
Nov
A cylinder of mass 10 kg and radius 15 cm is rolling perfectly on a plane of inclination 30^o . The coefficient of static friction μs = 0.25. (a) How much is the force of friction acting on the cylinder ? (b) What is the work done against friction during rolling ? (c) If the [...]
A disc rotating about its axis with angular speed ωo is placed lightly (without any translational push) on a perfectly frictionless table. The radius of the disc is R. What are the linear velocities of the points A, B and C on the disc shown in Fig. 7.41? Will the disc roll in the direction indicated?
27
Nov
A disc rotating about its axis with angular speed ωo is placed lightly (without any translational push) on a perfectly frictionless table. The radius of the disc is R. What are the linear velocities of the points A, B and C on the disc shown in Fig. 7.41? Will the disc roll in the direction [...]