Wrench Hand
September 30th, 2008
To tighten a bolt, you push with a force of 70 N at the end of a wrench handle that is 0.35 m from the axis?
To tighten a bolt, you push with a force of 70 N at the end of a wrench handle that is 0.35 m from the axis of the bolt.If you move your hand inward to be only 0.15 m from the bolt, what force do you have to exert to achieve the same torque?
Torque equals force times distance from the axis.
T=F*d
Initially, T equals (70 N)*(.35 m) = 24.5 Nm
So now that you have the desired torque value for the second part of the question, set up the equation again:
T=F*d —-> 24.5 Nm = F*(.15 m)
Solve for F, and you get 163.3 N
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