Okay, I have a few questions. Feel free to answer any that you can. (Even if it's only one.) :tongue: 1. What is an inertial reference frame? (Provide examples please.) 2. The mass of an object is a quantitative measure of inertia. What does this mean? 3. Is a net force being applied to an object when the object is moving downward with a constant velocity of 9.80 m/s? 4. A father and his seven-year-old daughter are facing each other on ice skates. With their hands, they push off against one another. (A) Compare the magnitudes of the pushing forces that they experience. (B) Which one, if either, experiences the larger acceleration?