a grinding wheel of mass 5.0kg and diameter 0.4 m is rotating with an

1.	a grinding wheel of mass 5.0kg and diameter 0.4 m is rotating with an angular speed of 2 rev S-1,calculate the torque which will increase its angular speed to 8 revolution per second in 2s.
Answer» torque=moment of INERTIA* alpha alpha= 8-2/2=3rev/s moment of inertia(if CONSIDERED RING)=mr^2=50.2^2=0.2 units torque=0.23=0.6 NM

a grinding wheel of mass 5.0kg and diameter 0.4 m is rotating with an angular speed of 2 rev S-1,calculate the torque which will increase its angular speed to 8 revolution per second in 2s.

Answer»

torque=moment of INERTIA* alpha

alpha= 8-2/2=3rev/s

moment of inertia(if CONSIDERED RING)=mr^2=5*0.2^2=0.2 units

torque=0.2*3=0.6 NM

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a grinding wheel of mass 5.0kg and diameter 0.4 m is rotating with an angular speed of 2 rev S-1,calculate the torque which will increase its angular speed to 8 revolution per second in 2s.

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