# Torque

Discussion in 'Community Discussion' started by applefiend95, Dec 9, 2012.

1. ### applefiend95 macrumors regular

Joined:
Jan 25, 2012
#1
I know this is totally irrelevant but i figured one you people may be good at this:

Joe is using a torque wrench to tighten the head bolts his monster truck. The required torque is 80 foot-pounds. The wrench handle is 18 long. How much force does Joe have to apply to properly tighten the bolts? While he tightening, his wrench measures 29 foot-pounds at a particular point. He turns the bolt farther exactly 45 degrees. The measured torque is now 50 ft.-lbs. He turns the bolt farther exactly another 45 degrees. The measured torque is now 69 ft.-lbs. Predict how many more centimeters he must move the wrench handle to reach 80 foot-pounds of torque. Predict the torque at which the bolt will begin to break.

the final torque they need to have is 11 => 80-69=11
help please. thanks in advance

2. ### ashleypenny macrumors member

Joined:
Dec 8, 2012
#2
Joe needs to do his own homework else the bolts will break!

3. ### ideal.dreams macrumors 68020

Joined:
Jul 19, 2010
Location:
OH
#3
1) Do your own homework, it'll benefit you later.
2) This is a forum for discussing iMacs, not Torque

Joined:
Mar 11, 2012
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Location:
New York, NY

Joined:
Jun 24, 2012
7. ### digitalfailure macrumors regular

Joined:
Sep 24, 2012
#7
Joe should have used a snap on tech-angle torque wrench and then he could have watched the torque applied reading rise and see the torque applied for a given angle of rotation on a lovely LCD display. That way he'd get the head tightened down a damn site quicker

8. ### mobilehaathi macrumors G3

Joined:
Aug 19, 2008
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The Anthropocene
#8
It is quite simple really, [redacted]. But you know, you really should learn to do your own homework.

9. ### iJohnHenry macrumors P6

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On tenterhooks
10. Dec 9, 2012
Last edited: Dec 9, 2012

### wordoflife macrumors 604

Joined:
Jul 6, 2009
#10
for the unlined part, could you just use t=rf, so 80=1.5f, so f = 53.3 of force. 1.5 is from the 18 inches, convert your units.

for the bold part, wouldn't it be just anything over 80 ft/lb?

and the middle part 11 = 1.5f so the force is 7.3 (not sure about unit for this, I normally use newtons because i use SI units). Now how to get the centimeters from that force, not sure. might give you an idea though.

also, this could be totally wrong lol