A mechanic is working on an engine and needs to tighten a bolt onto a the engine

Question

A mechanic is working on an engine and needs to tighten a bolt onto a the engine block by using a wrench. Assume a typical threading (righty tighty, lefty loosey.)

a.) identify the lever arm in this scenario

b.) how should the mechanic apply his/her force in order to maximize torque? That is, at what angle to the lever arm will his/her force provide the most torque?

c.) in what direction is the torque applied? Use the Cartesian xyz coordinates, in which the bolt is in the x-y plane and positive z is the direction toward space.

Explanation / Answer

A mechanic is working on an engine and needs to tighten a bolt onto a the engine

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