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If there is a load of say, mass =m Kg which is being raised on the end of a light inextensible rope by means of a winch.

see attachment.

the pulley of the winch has a radium x meters and is lets say that it is frictionless.

the acceleration of the load is

can someone tell me how would i calculate the Torque / moment on the pulley ?

i know that

here is what

net force =

But the equation in my notes says otherwise :

let K = the torque applied by the winch (the torque driving the pulley)

Torque on the pulley = K - (x)(T)

which one is correct and why ?

see attachment.

the pulley of the winch has a radium x meters and is lets say that it is frictionless.

the acceleration of the load is

**a**ms^-2can someone tell me how would i calculate the Torque / moment on the pulley ?

i know that

__torque = Force * Displacement__here is what

*i think*shud be the correct equation :net force =

**N**=**T**- mg**N**[x]= TorqueBut the equation in my notes says otherwise :

let K = the torque applied by the winch (the torque driving the pulley)

Torque on the pulley = K - (x)(T)

which one is correct and why ?