Forces of Motion 1. I can show how contact and non-contact forces can change the motion of an object. 2. I can describe what happens when two forces act on an object in the same or opposing directions. 3. I can explain the concept of zero net forces. 4. I can explain why unbalanced forces cause changes in the motion of objects. 5. I can explain Newton’s three laws of motion and how they relate to motion and force. 6. I can describe the motion of an object in terms using speed, velocity, and acceleration. 7. I can explain the difference between contact forces and non-contact forces.