A disc of mass 
and radius ‘
’ 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 
each are placed in it on either side of the centre of the disc as shown in Figure. The disc is given an initial angular velocity 
and released
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The angular speed of the disc when the balls reach the end of the disc is
a)
b)
c)
d)
and radius ‘ ’ 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 each are placed in it on either side of the centre of the disc as shown in Figure. The disc is given an initial angular velocity and releasedThe angular speed of the disc when the balls reach the end of the disc is
a)
b)
c)
d)
Question ID - 101343 | SaraNextGen Top Answer A disc of mass and radius ‘ ’ 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 each are placed in it on either side of the centre of the disc as shown in Figure. The disc is given an initial angular velocity and released
The angular speed of the disc when the balls reach the end of the disc is
a)
b)
c)
d)
A disc of mass and radius ‘ ’ 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 each are placed in it on either side of the centre of the disc as shown in Figure. The disc is given an initial angular velocity and released
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The angular speed of the disc when the balls reach the end of the disc is |
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a) |
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b) |
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c) |
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d) |
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(b) Let the angular speed of the disc when the reach the end be
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. From conservation of angular momentum
