a uniform disk of mass 3kg and radius 12cm rotates at 480 rev/min. find its kinetic energy (Hint : I of uniform disk =1/2MR2)

Question

bobpursley · Accepted Answer

KE=1/2 I w^2 angular speed= PI*rev/min*1min/60sec= 480*2pi/60= 50.3 rad/sec I= 1/2 *3*.12^2=.0216 kg.m^2 KE=1/2 *I*w^2

Anonymous · Answer

a uniform disk of mass 3kg and radius 12cm rotates at 480 rev/min. find its kinetic energy (Hint : I of uniform disk =1/2MR2)