1. What Is the Name of the Property of Objects to Maintain Their States of Motion?

Chapter 2 Vocabulary Review

Vocabulary words: equilibrium rule, force, inertia, net force, Newton’s 1st law, speed, velocity, support force, normal force, vector quantity, magnitude, distance, displacement, average speed, average velocity, frame of reference, motion, friction, static equilibrium, dynamic equilibrium

1. What is the name of the property of objects to maintain their states of motion? 2. Distinguish between speed & velocity. 3. Why do we say velocity is a vector quantity and speed is not? 4. How can you be both at rest and also moving at 100,000 km/hr at the same time? 5. What is the tendency of a moving object when no forces act on it? 6. When only a pair of equal and opposite forces act on an object, what is the net force acting on it? 7. Is force a vector quantity? Why or why not? 8. What is the name given to the force that occurs in a rope when both ends are pulled in opposite directions? 9. How much tension is there in a rope that holds a 20 N bag of apples at rest? 10. What does ∑F = 0 mean? 11. Give an example of something moving when a net force of zero acts on it. 12. If we push a crate at constant velocity, how do we know how much friction acts on the crate compared to our pushing force? 13. If you’re in a smooth-riding bus that is going at 50 km/hr and you flip a coin vertically, what is the horizontal velocity of the coin in midair? 14. When the space shuttle moves in a nearly circular orbit around the Earth is a force needed to maintain its high speed? If suddenly the force of gravity were cut off, what type of path would the shuttle follow? 15. What is the net force on a bathroom scale when a 110 pound person stands on it?