You're carrying a 4.0-mm-long, 22 kg pole to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold the other end of the pole 35 cm from its tip.
How much force must you exert to keep the pole motionless in a horizontal position?

    F = 118.14 N

Explanation:

For this exercise we will use the rotational equilibrium condition

      ∑ τ = I α = 0

Since the pole  is in balance.

Let's fix a reference system located the point where the post rests on the fence, select the counterclockwise rotation as positive

         -F (L -0.35) + W L / 2 = 0

         F = W L / 2 (L-0.35)

         L = 4.0 m

Let's calculate

         F = 22 9.8 2 / 3.65

         F = 118.14 N

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

a is the best answer your welcome