Example 1:
A length of wire is cut into five equal pieces. The five pieces are then connected in parallel
with the resulting resistance being 2.009. What was the resistance of the original length of wire
before it was cut up?

Ibelieve the answer is b

Gravity, from the center of mass of the box, extending downward normal force, from the floor under the box, extending upward, equal to gravity push force, acting at a point on the box, extending in the direction of motion friction, acting at any point on the box directly opposite the push, extending directly opposite to the motion