Kendall does 30 newton-meters of work pushing her sofa halfway across the living room. her living room is 10 meters long. how much force did kendal use? 30 newtons 10 newtons 3 newtons unknown

3 Newtons

Explanation:

The work done by Kendall is given by:

where

F is the force

d is the displacement of the sofa

In this problem, we know

W = 30 Nm = 30 J

d = 10 m

So we can solve the formula for F to find the force used by Kendal:

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

6 cos 34, 6 sin 34 trig