Two students are pulling a 15 kg bag of volleyball equipment in the same direction one using 45 N and the other using 60 N of force. The friction force between the bag and the floor is 15 N. What is the net force acting on the bag?

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.