A wheel of radius R rolls on the ground with a uniform velocity v. The velocity of topmost point relative to the bottommost point is
1. v
2. 2v
3. v/2
4. zero
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe figure shows a uniform solid block of mass M and edge lengths a, b and c. Its M.O.I. about an axis through one edge and perpendicular (as shown) to the large face of the block is
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe moment of inertia of a cube of mass m and side a about one of its edges is equal to
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf the net external forces acting on the system of particles is zero, then which of the following may vary ?
1. Momentum of the system
2. Velocity of centre of mass
3. Position of centre of mass
4. None of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA constant torque of 1000 N-m turns a wheel of moment of inertial 200 about an axis through its centre. Its angular velocity after 3 s is
1. 1 rad/s
2. 5 rad/s
3. 10 rad/s
4. 15 rad/s
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPoint masses and are placed at the opposite ends of a rigid of length L and negligible mass. The rod is to be set rotating about an axis perpendicular to it. The position of point P on this rod through which the axis should pass so that the work required to set the rod rotating with angular velocity is minimum is given by
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA circular disc of radius r has a uniform thickness. A circular hole of diameter equal to the radius of the disc has been cut out as shown. The centre of gravity of the remaining disc lies on the diameter of the disc at a distance x to the left of the centre of the original disc. The value of x is
1. r
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 'T' shaped object with dimensions shown in the figure, is lying on a smooth floor. A force '' is applied at the point P parallel to AB, such that the object has only the translational motion without rotation. Find the location of P with respect to C
1.
2. I
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA wheel is rotating about an axis through its centre at 720 r.p.m. It is acted upon by a constant torque opposing its motion for 8 seconds to bring it to rest finally. The value of torque in Nm is: (given l = kg )
1. 48
2. 72
3. 96
4. 120
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAssertion : The speed of whirlwind in a tornado is alarmingly high.
Reason : If no external torque acts on a body, its angular velocity remains conserved.
1. If both assertion and reason are true and reason is the correct explanation of assertion.
2. If both assertion and reason are true but reason is not the correct explanation of assertion.
3. If assertion is true but reason is false.
4. If both assertion and reason are false.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology