Find angular accleration to find torque

AI Thread Summary
To calculate torque using the formula T=I*α, knowing the motor speed in revolutions per second is essential. The motor speed of 2500 rev/s translates to an angular speed of 261.8 radians per second. If the angular speed is constant, the angular acceleration (α) is zero, which simplifies the torque calculation. The relationship between torque in and out is more critical than the moment of inertia in this context. Understanding these concepts is key to accurately determining torque in this scenario.
pully89
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Ok, I have a a motor, so I know the speed in rev/s. The motor is going to power a wheel, so I have a second moment of area?, (I), and I want to calculate the torque. I know I can do this by using T=I*\alpha. The speed of the motor is 2500 revolutions per second. So \omega is 2\pif, which is 261.8 radians per second, but from here I am confused on how to work out the angular acceleration, although I think that \alpha=\Delta\omega/\Deltat, but I'm still not sure how to get alpha, can anyone help?
 
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welcome to pf!

hi pully89! welcome to pf! :smile:

(have an alpha: α and a delta: ∆ and a pi: π and a tau: τ and an omega: ω :wink:)

if ω (angular speed) is constant, then α (angular acceleration) is zero

the relevant equation balances the torque in with the torque out, and really has almost nothing to do with I (the mass moment of area, or moment of inertia) :wink:
 
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