# 313 Maximum Torque That Can be Applied to a Hollow Steel Shaft

### how find the value of L?? in

how find the value of L?? in the question I don't found the value of L?? but in solutions I see the value L-1000

### Hi there Ahsan! I think they

Hi there Ahsan! I think they used 1000 to make the imaginary "L" into a mm unit so that the equation is suitable to the formula. You're welcome in advance!

### The length is actually given

The length is actually given if you read it carefully. It is indicated in the maximum angle of twist which is 0.5 deg/m. That is for every 1 meter (or 1000 mm), you are limited to 0.5 deg rotation.

### Is there no need to convert 0

Is there no need to convert 0.5 deg/m to deg/mm ? ^^; i tried solving it on my own but noticed you didn't so i was wondering

### There is no need if your L =

There is no need if your L = 1000 mm in the right side of the equation, but if your L = 1 mm, then you should convert that that angle to deg/mm.

### Oh and uhh it says in the

Oh and uhh it says in the problem to <strong>Determine the maximmum torque</strong> but why do we choose the smaller one???

### It actually means the maximum

It actually means the maximum safe torque. If you load the larger larger torque, itwill resist the shear, but, it will twist beyond the allowable.

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