Engineering Mechanics
When a body of mass moment of inertia 'I' (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is

0.5 Iω2
Iω2
0.5 Iω

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Engineering Mechanics
Coplanar concurrent forces are those forces which

Do not meet at one point, but their lines of action lie on the same plane
Do not meet at one point and their lines of action do not lie on the same plane
Meet at one point and their lines of action also lie on the same plane
Meet at one point, but their lines of action do not lie on the same plane

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