1. Why is a frame of reference necessary for describing the motion of an object of an object? 2. What is the difference between positive and negative acceleration? Give an example. 3. Describe Newton's Laws and give an example that illustrates each. 4. Describe the difference between the four fundamental forces: Gravity, Weak Nuclear, Electromagnetism, and Strong Nuclear. 5. Describe mechanical work and give an example of work. 6. Describe mechanical power and discuss how we calculate power