If a torque of 55.0 n/m is required and the largest force that can be exerted by you is 135 n what is th e length of the lever arm that must be used?

Explanation:

Torque is defined as the cross product between the position vector ( the lever arm vector connecting the origin to the point of force application) and the force vector.

Due to the definition of cross product, the magnitude of the torque is given by:

Where is the angle between the force and lever arm vectors. So, the length of the lever arm (r) is minimun when is equal to one, solving for r:

yup its correct its: c) b b