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Grade: 11
        a uniform ring of mass 20kg and radius 0.30m is making 2100 rpm about its geometrical axis.then, the rotational Kinetic energy of the ring about the axis is ?
3 years ago

Answers : (1)

Vikas TU
10402 Points
							
Rotational Kinetic energy = 0.5*I*w^2 => 0.5*(mr^2)*(2100*2pi/60) 
=> 0.5*(20*0.09)*(70pi)
=> 63pi Joule.
3 years ago
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