One page editable worksheet covering friction, static, sliding, Law of Universal Gravitation, mass, weight, etc. 1) Define friction. 2) Explain the difference between static and sliding friction. 3) Illustrate and explain the law of universal gravitation. 4) Identify two types of forces acting on you as you sit in your chair. 5) Predict if my mass or my weight would change if I were to travel to the moon. 6) Determine a way to increase friction. Ex.) If I were walking on ice, what could I d