Calculating Torque for Spinning a 250g Plastic Disk on an Electric Motor in 4.6s

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To calculate the torque required to spin a 250g plastic disk from 0 to 1500 rpm in 4.6 seconds, the angular acceleration must first be determined by converting rpm to radians per second and then dividing by time. The moment of inertia for the disk can be calculated using its mass and diameter, applying the appropriate formula for a disk rotating about its center. The relationship between torque, moment of inertia, and angular acceleration is defined by the equation τ = Iα. After calculating the moment of inertia and angular acceleration, the torque can be derived. The discussion emphasizes the importance of using consistent units and understanding the equations governing rotational motion.
  • #31
got it was 6.7x10^-2
thanks haruspex and cwatters
 
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  • #32
Just for info I made it 6.45x10-2Nm
 
  • #33
CWatters said:
Just for info I made it 6.45x10-2Nm
I get 6.67x10-2.
 
  • #34
Oops yes found my mistake. Agree with your figure.
 

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