Assume all bones are massless in this approximation. You hold a dumbell m=9$=9$ kg. 

 

Distance from elbow joint to muscle attachment =0.028$=0\mathrm{.}028$ m

Distance from elbow joint to hand =0.3$=0\mathrm{.}3$ m

What is the torque about the elbow joint due to the dumbell? Nm

What is the force provided by the muscle counteract this torque? N

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The torque is the rotational equivalent of force in a rotational system It is calculated using the e... View the full answer