A girl is pushing on an object with a force of 25 N. A boy is pushing on the same object but from the other direction with a force of 35 N. What is the net force acting on the object?

Since the force applied at both ends is acting in opposite directions, then the resultant force becomes negative.

= 35 - 25 = 10

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.