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Name________________________ Hour__________ Chapter 6 Review Section 6.1 1. Define Force. ___________________________________________________________________________ 2. Define Friction. _________________________________________________________________________ 3. What are the four types of friction? a. _____________________________________________________ b. _____________________________________________________ c. _____________________________________________________ 4. State Newton’s first Law. _________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 5. What will happen to an object’s motion if the net force is equal to zero? ___________________________ 6. What will happen to an object’s motion if the net force is NOT equal to zero? _______________________ 7. What can happen to an object’s motion if the forces are unbalanced? a. ___________________________________________________ b. ___________________________________________________ c. ___________________________________________________ 8. When the forces on an object are unbalanced, in what direction will the object move? ______________________________________________________________________________________ 9. Define inertia. __________________________________________________________________________ 10. How are mass and inertia related? __________________________________________________________ ______________________________________________________________________________________ 11. Two objects are picture below. Answer questions a-c about the objects. a. Which object has the most inertia? How do you know? ___________________________________ ________________________________________________________________________________ b. Which object will be easiest to start moving? How do you know? ___________________________ ________________________________________________________________________________ c. Once moving, which object will be the most difficult to stop? How do you know? ______________ ________________________________________________________________________________ 12. Use Newton’s first law to explain what you feel in a car when the car is stopped and then suddenly starts moving. You should have the word inertia somewhere in your explanation. ________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ Section 6.2 13. What is the SI Unit for force? ____________________________________ 14. What is a newton? _______________________________________________________________________ ______________________________________________________________________________________ 15. State Newton’s Second Law. _______________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 16. List the three main ideas involving newton’s second law: a. ________________________________________________________________________________ b. ________________________________________________________________________________ c. ________________________________________________________________________________ 17. You are pushing a cart along a level path. What will happen to the cart’s acceleration if the mass in the cart is increased? _______________________________________________________________________ ______________________________________________________________________________________ 18. You need to move two carts of the same mass. You push the first cart with a force of 10 N. You push the second cart with a force of 20 N. Which cart will accelerate more? ________________________________ ______________________________________________________________________________________ 19. Bobby is using a spring-loaded dart gun to practice target shooting. His three guns each have a spring that shoots a dart with a force of 100, 200, and 300 N. Which spring will cause a dart to accelerate the most? ______________________________________________________________________________________ 20. What is equation for newton’s second law? __________________________________________________ 21. Fill out the following table with the missing information. If you want to find… Use the equation… Your answer will be in units of… a (acceleration) F (force) m (mass) 22. A force of 25 N acts on a cart with a mass of 15 kg. What is the acceleration of the cart? 23. Karry pushes on a cart with a mass of 5 kg. She measures the acceleration of the cart to be 0.75 m/s2. With what force did Karry push on the cart? Section 6.3 24. State Newton’s third law. _________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 25. How do forces compare in size in action-reaction force pairs? ____________________________________ 26. How do forces compare in direction in action-reaction force pairs? ________________________________ 27. What is an action-reaction force pair? _______________________________________________________ ______________________________________________________________________________________ 28. Do action and reaction forces act alone or at the same time? ____________________________________ 29. If action-reaction forces are equal in size, but opposite in direction why do they not cancel out? ________ ______________________________________________________________________________________ 30. Identify the action and reaction force in the following situations: a. You throw a baseball Action: ________________________________ Reaction:________________________________ b. A large boulder falls to earth. Action: ________________________________ Reaction: ________________________________ c. You use your arms to swim in a pool. Action: ________________________________ Reaction: ________________________________ d. You are walking along a level path. Action: ________________________________ Reaction: ________________________________ 31. Explain why Newton has more acceleration than the elephant in the picture below even though there are equal amounts of force acting on each one. Assume the elephant has a much larger mass than Newton. ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ Match Game: In the blank provided write 1 for 1st law, 2 for 2nd law, or 3 for 3rd law depending on which law best explains the situation. 32. A notebook sits on a desk, unmoving. _____________ 33. A semi truck takes longer to speed up than a small car. _____________ 34. You skate along an ice rink because of the motion of your legs. _____________ 35. In outer space, a comet will stay in a straight line path unless in encounters the sun. Then it will change paths. _____________