Two children having a disagreement pull on a 50n sled in opposite directions. one pulls with a force of 300n east, the other with a force of 220n west. a frictional force of 30n exists between the sled and the surface. draw a free body diagram showing all the forces acting on the sled, and determine the net force on the sled

Since forces are vector quantities, we must indicate direction using positive and negative values. East will be assigned positive and west will be negative. Friction will act as a negative force since it impedes action. To calculate the net force we sum the vector quantities, as follows. Net force equals 50n which is derived by the following calculation: 300n-220n-30n.