A 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 N-m is: (given \(I\) = kg )
1. \(48\)
2. \(72\)
3. \(96\)
4. \(120\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo rotating bodies \(A\) and \(B\) of masses \(m\) and \(2m\) with moments of inertia and have equal kinetic energy of rotation. If and be their angular momenta respectively, then:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA solid cylinder of mass \(50\) kg and radius \(0.5\) m is free to rotate about the horizontal axis. A massless string is wound around the cylinder with one end attached to it and the other end hanging freely.
The tension in the string required to produce an angular acceleration of \(2\) revolutions/s2 will be:
1. \(25\) N
2. \(50\) N
3. \(78.5\) N
4. \(157\) N
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology