You use a lever to lift a heavy tree branch you apply a force of 100 n and the
lever lifts the branch with a force of 350 n what is the mechanical advantage
of the lever?

3.5

Explanation:

Mechanical advantage = force out / force in

MA = 350 N / 100 N

MA = 3.5

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

see earlier answer