Q: A wheel having moment of inertia 2 kg-m^2 about its vertical axis, rotates at the rate of 60 rpm about this axis. The torque which can stop the wheel’s rotation in one minute would be (a) 2π/15 N-m (b) π/12 N-m (c) π/15 N-m (d) π/18 N-m Ans: (c) Sol: L = I ω ; Where I = Moment of Inertia L = I (2 π ν) ; Where ν = frequency L = 2 (2 π × 1 ) = 4 π Torque = L/Δt = 4π /60 = π /15 N-m Also Read :A flywheel rotating about a fixes axis has a kinetic energy of 360 joule when its angular speed is…A constant torque of 1000 N-m, turns a wheel of moment of inertia 200 kg-m^2 about an axis through…A wheel rotates around a stationary axis so that the rotation angle θ = kt^2, where k = 1.5 rad s-2.…A wheel of moment of inertia I and radius R is rotating about its axis at an angular speed ωo....A turntable turns about a fixed vertical axis, making one revolution in 10 s. The moment of inertia…The moment of inertia of a rod about an axis through its centre and perpendicular to it is (1/12)…The moment of inertia of a circular disc of radius 2 m and mass 1 kg about an axis passing through…A horizontal turn table in the form of a disc of radius r carries a gum at G and rotates with…If I1 is the moment of inertia of a thin rod about an axis perpendicular to its length and passing…A ballet dancer, dancing on a smooth floor is spinning about a vertical axis with her arms folded… Post navigation A coil is placed in a transverse magnetic field of 0.02 T. If this coil starts shrinking at a rate of 1 mm/s … A thin hollow sphere of mass ‘m’ is completely filled with a liquid of mass ‘m’ when the sphere rolls with a velocity…