Taking a shot in the dark here as i mostly deal with atomic structure and the fact i haven't handled a diverging mirror ut would it be a virtual image because that needs parallel normal lines which cannot occur
I reported this question by accident, I am sorry.
Anyways, there is no electric field at the center of a charged spherical conductor because all the charged particles are at the edges and because of the complete cancellation everywhere.
Mechanical advantage = ideal mechanical advantage x efficiency = 3.5 x 0.6 = 2.1
The mechanical advantage of the inclined plane is 2.1
