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*pulley*What is the torque required to rotate that

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- Thread starter ravipatil666
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What is the torque required to rotate that

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tiny-tim

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.pulley

What is the torque required to rotate thatpulley

Hi ravipatil666! Welcome to PF!

Torque = distance "cross" force …

so what is the radius of the pulley?

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the pulley has 26mm radius..

f=m*g

r=.026

and T=f*r (N-m)

thats it?

f=m*g

r=.026

and T=f*r (N-m)

thats it?

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and thanks 4 my post tiny-tim

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tiny-tim

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the pulley has 26mm radius..

f=m*g

r=.026

and T=f*r (N-m)

thats it?

Yup! It's as easy as that!

(except that you don't need the "g", since the mass is given to you in newtons, not kg, anyway )

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oh ya my mistake....

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and i want to know when does the eq T=I*alpha

comes into picture???

comes into picture???

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wht happens if the width of the pulley s increased?

bcoz width has nothing to do in the eq only radius s considered.

- #9

tiny-tim

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and i want to know when does the eq T=I*alpha

comes into picture???

(have an alpha: α )

ah, that's only if the pulley has non-negligible mass, and you want to find how fast it's rotating …

I is the moment of inertia of the pulley, and α is the angular acceleration.

wht happens if the width of the pulley s increased?

nothing … only the radius matters.

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thanks(dhanyawaad).........

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