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1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 3rd Nine Weeks Study Guide Ch. 9 How do you know when an object is in motion? What is a reference point? How do you calculate speed? What do you plot on a line graph to show the motion of an object? What does a horizontal line represent on this type of graph? What is constant speed? How do you calculate average speed? If a truck travels 65 km in the first hour of a trip and continues to travel for 3 more hours over a distance of 285 km, what is the average speed of the truck? What is velocity? What is the rate at which velocity changes? List the three ways to accelerate. A falling object accelerates from 5 m/s to 10 m/s in 3 seconds. What is it’s average acceleration? What does a straight line indicate on a speed versus time acceleration graph? If a car travels 60 km in the first hour of trip and then continues to travel for 3 more hours and travels 280 km, what was the average speed of the car for the entire trip? Ch. 10: Force What is a force? What is the SI unit for force? When forces are acting on the same object, when do you add them? When do you subtract them? When do you not add or subtract forces? How do balanced forces affect an objects’ motion? What is inertia? How does inertia change as mass increases? What is weight? When the only force acting on a falling object is gravity, the object is said to be in ___________. Objects falling through air experience a type of friction called what? What is friction? What are the four types of friction? (Be sure you can pick out examples of them) What is Newton’s first law of motion? What is another name for Newton’s first law of motion? According to Newton’s second law of motion, what are two ways to increase the acceleration of an object? According to Newton’s third law of motion, when you hit the desk with your hand the desk does what? What is momentum? What are two ways to increase the momentum of an object? 19. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. State the law of conservation of momentum. Ch. 13: Energy What is energy? How do you know if work is done on an object? What unit is power measured in? What is the unit for work? What is the unit for energy? The energy associated with motion is _____________________. Stored energy is ___________________________. What is gravitational potential energy? What is the difference between mechanical and thermal energy? A 5 kg object moving at a speed of 6 m/s has a kinetic energy of what? What two things do you need to increase to increase the kinetic energy of an object? What is the energy associated with the motion and position of an object? What is an energy transformation? When an object falls what is the energy transformation that is taking place? (What type of energy is being transformed into what other type of energy as the ball falls) The rate at which energy is transferred is known as what? What does the law of conservation of energy state? What type of energy does a spinning object have? Who suggested that energy can be created under certain conditions? How do you calculate mechanical energy? When you rub your hands together, what is the energy transformation taking place? List and define the 5 forms of energy associated with the particles of an object. Chapter 11: Pressure Why do snowshoes help a person walk on deep snow? What is the SI unit for pressure? What direction is pressure exerted? What happens to pressure in relation to elevation and water depth? Why is our body not crushed by air pressure? What is balanced pressure? What is Bernoulli’s principle? Give examples. What is Archimedes’s principle? Give examples. What is Pascal’s principle? Give examples. What is buoyant force? What is lift? What is fluid? An object has a mass of 15.8 g and a volume of 14.5 cm3. What is its density? What does a hydraulic system do? What will happen to an object that is more dense than the fluid in which it is immersed? Less dense?