365658 A person, with outstretched arms, is spinning on a rotating stool. He suddenly brings his arms down to his sides. Which the following is true about his kinetic energy \(K\) and angular momentum \(L\) ?

365659 A disc of moment of interia \('{I_1}'\) is rotating in horizontal plane about an axis passing through its centre and perpendicular to its plane with constant angular speed \('{\omega _1}'\). Another disc of moment of interia \('{I_2}'\) having zero angular speed is placed co - axially on a rotating disc. Now, both the discs are rotating with constant angular speed \('{\omega _2}'\). The energy lost by the initial rotating disc is

365660 A disc is rotating with an angular speed of \(\omega\). If a child sits on it, which of the following is conserved?

365661 Assertion :
When moment of inertia of a rotating body changes, its angular momentum remain conserved, (in the absence of external torque) but its kinetic energy changes.
Reason :
Angular momentum does not depend upon moment of inertia of the body.

365662 A disc of mass ' \(m\) ' and radius ' \(R\) ' is free to rotate in a horizontal plane about a vertical smooth fixed axis passing through its centre. There is a smooth groove along the diameter of the disc and two small balls of mass \(m/2\) each are placed in it on either side of the centre of the disc as shown in the figure. The disc is given an initial angular velocity \(\omega_{0}\) and released.
The angular speed of the disc when the balls reach the end of the disc is

365658 A person, with outstretched arms, is spinning on a rotating stool. He suddenly brings his arms down to his sides. Which the following is true about his kinetic energy \(K\) and angular momentum \(L\) ?

365659 A disc of moment of interia \('{I_1}'\) is rotating in horizontal plane about an axis passing through its centre and perpendicular to its plane with constant angular speed \('{\omega _1}'\). Another disc of moment of interia \('{I_2}'\) having zero angular speed is placed co - axially on a rotating disc. Now, both the discs are rotating with constant angular speed \('{\omega _2}'\). The energy lost by the initial rotating disc is

365660 A disc is rotating with an angular speed of \(\omega\). If a child sits on it, which of the following is conserved?

365661 Assertion :
When moment of inertia of a rotating body changes, its angular momentum remain conserved, (in the absence of external torque) but its kinetic energy changes.
Reason :
Angular momentum does not depend upon moment of inertia of the body.

365662 A disc of mass ' \(m\) ' and radius ' \(R\) ' is free to rotate in a horizontal plane about a vertical smooth fixed axis passing through its centre. There is a smooth groove along the diameter of the disc and two small balls of mass \(m/2\) each are placed in it on either side of the centre of the disc as shown in the figure. The disc is given an initial angular velocity \(\omega_{0}\) and released.
The angular speed of the disc when the balls reach the end of the disc is

365658 A person, with outstretched arms, is spinning on a rotating stool. He suddenly brings his arms down to his sides. Which the following is true about his kinetic energy \(K\) and angular momentum \(L\) ?

365659 A disc of moment of interia \('{I_1}'\) is rotating in horizontal plane about an axis passing through its centre and perpendicular to its plane with constant angular speed \('{\omega _1}'\). Another disc of moment of interia \('{I_2}'\) having zero angular speed is placed co - axially on a rotating disc. Now, both the discs are rotating with constant angular speed \('{\omega _2}'\). The energy lost by the initial rotating disc is

365660 A disc is rotating with an angular speed of \(\omega\). If a child sits on it, which of the following is conserved?

365661 Assertion :
When moment of inertia of a rotating body changes, its angular momentum remain conserved, (in the absence of external torque) but its kinetic energy changes.
Reason :
Angular momentum does not depend upon moment of inertia of the body.

365662 A disc of mass ' \(m\) ' and radius ' \(R\) ' is free to rotate in a horizontal plane about a vertical smooth fixed axis passing through its centre. There is a smooth groove along the diameter of the disc and two small balls of mass \(m/2\) each are placed in it on either side of the centre of the disc as shown in the figure. The disc is given an initial angular velocity \(\omega_{0}\) and released.
The angular speed of the disc when the balls reach the end of the disc is

365658 A person, with outstretched arms, is spinning on a rotating stool. He suddenly brings his arms down to his sides. Which the following is true about his kinetic energy \(K\) and angular momentum \(L\) ?

365659 A disc of moment of interia \('{I_1}'\) is rotating in horizontal plane about an axis passing through its centre and perpendicular to its plane with constant angular speed \('{\omega _1}'\). Another disc of moment of interia \('{I_2}'\) having zero angular speed is placed co - axially on a rotating disc. Now, both the discs are rotating with constant angular speed \('{\omega _2}'\). The energy lost by the initial rotating disc is

365660 A disc is rotating with an angular speed of \(\omega\). If a child sits on it, which of the following is conserved?

365661 Assertion :
When moment of inertia of a rotating body changes, its angular momentum remain conserved, (in the absence of external torque) but its kinetic energy changes.
Reason :
Angular momentum does not depend upon moment of inertia of the body.

365662 A disc of mass ' \(m\) ' and radius ' \(R\) ' is free to rotate in a horizontal plane about a vertical smooth fixed axis passing through its centre. There is a smooth groove along the diameter of the disc and two small balls of mass \(m/2\) each are placed in it on either side of the centre of the disc as shown in the figure. The disc is given an initial angular velocity \(\omega_{0}\) and released.
The angular speed of the disc when the balls reach the end of the disc is

365658 A person, with outstretched arms, is spinning on a rotating stool. He suddenly brings his arms down to his sides. Which the following is true about his kinetic energy \(K\) and angular momentum \(L\) ?

365659 A disc of moment of interia \('{I_1}'\) is rotating in horizontal plane about an axis passing through its centre and perpendicular to its plane with constant angular speed \('{\omega _1}'\). Another disc of moment of interia \('{I_2}'\) having zero angular speed is placed co - axially on a rotating disc. Now, both the discs are rotating with constant angular speed \('{\omega _2}'\). The energy lost by the initial rotating disc is

365660 A disc is rotating with an angular speed of \(\omega\). If a child sits on it, which of the following is conserved?

365661 Assertion :
When moment of inertia of a rotating body changes, its angular momentum remain conserved, (in the absence of external torque) but its kinetic energy changes.
Reason :
Angular momentum does not depend upon moment of inertia of the body.

365662 A disc of mass ' \(m\) ' and radius ' \(R\) ' is free to rotate in a horizontal plane about a vertical smooth fixed axis passing through its centre. There is a smooth groove along the diameter of the disc and two small balls of mass \(m/2\) each are placed in it on either side of the centre of the disc as shown in the figure. The disc is given an initial angular velocity \(\omega_{0}\) and released.
The angular speed of the disc when the balls reach the end of the disc is