Questions
A flywheel having a radius of gyration of 2 m and mass 10 kg rotates at an angular speed of 5 rad s-1 about an axis perpendicular to it through its centre. The kinetic energy of rotation is
detailed solution
Correct option is A
∴ I=mK2=10(2)2=40 kg-m2Kinetic energy of rotation,KR=12Iω2=12(40)(5)2=500 JTalk to our academic expert!
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A uniform thin rod of length l and mass m is hinged at a distance l/4 from one of the end and released from horizontal position as shown in Fig. The angular velocity of the rod as it passes the vertical position is
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