The lesson started with a review of the homework questions, along with a series of questions to expand on the answers. Demonstrations of a toy car given a push from rest was used to elicit all the forces acting on the car, both at rest and in motion. A block was pulled with a constant force, measured by a spring balance in a straight line. The two states of equilibrium were exhibited by this, static and dynamic. The question was posed that if there was a constant force moving the block, and the block was in equilibrium, what is the equal and opposite force? Friction was determined to be the force, both acting on the block and also slowing the car down when pushed. In order for the sum to be equal to zero, the forces had to be equal.The class ended with a problem for Abby to consider for the next class; What forces are acting on an airplane flying at constant speed and in one direction? Assig: text questions 11-16 chapter 2