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Work & Energy Study Guide Physical Science NAME: ____________________________ Date: __________________ _______ 1. If the object to which force is being applied does not move or change motion, then work is equal to this _______ 2. 1 joule is equivalent to these two things _______ _____________________ 3. Is done when force causes a change in the position of an object _____________________ 4. Is the rate at which work is done _____________________ 5. SI unit of power _____________________ 6. They help us by redistributing the work that we put into them _____________________ 7. The most basic type of machine _____________________ 8. Have the fulcrum at one end and the input force is on the other end _____________________ 9. Tells how much a machine multiplies force or increases distance _____________________10. The type of machine that has a rigid arm and pivots on a fulcrum _____________________11. Formula for work _____________________12. Equivalent of one watt _____________________13. Most common type of lever _____________________14. Multiple pulleys can be put to together to form this _____________________15. Type of pulley with a MA of 3 _____________________16. The two families of simple machines _____________________ _____________________17. Is a lever or pulley connected to a shaft _____________________18. Type of pulley with a MA of 2 _____________________19. Formula for power _____________________20. Simple machines that change both the magnitude and the direction of force _____________________21. SI unit for work _____________________22. Number of watts in one horsepower Work & Energy Study Guide Physical Science NAME: ____________________________ Date: __________________ _____________________23. This type of lever always multiplies force _____________________24. Are modified levers _____________________25. Formula for mechanical advantage _____________________26. The three types of pulleys _____________________ _____________________ _____________________27. These can increase the distance over which work is being done or multiply the force of work being done _____________________28. The six basic types of simple machines _____________________ _____________________ _____________________ _____________________ _____________________ _____________________29. Have the fulcrum in the middle and the input and output forces on opposite ends of the arm _____________________30. Is a modified inclined plane _____________________31. Is an inclined plane wrapped around a cylinder _____________________32. The capacity to do work _____________________33. Type of pulley with a MA of one _____________________34. Formula for potential energy _____________________35. Are devices that combine two or more simple machines _____________________36. These are classified by the location of the fulcrum and of the input and output forces _____________________37. This type of lever multiplies distance _____________________38. It turns a single downward force into two forces directed out to the sides _____________________39. SI unit of energy Work & Energy Study Guide Physical Science NAME: ____________________________ Date: __________________ _____________________40. The three classes of levers _____________________ _____________________ _____________________41. Is the energy stored in any compressed or stretched object _____________________42. Two main forms of mechanical energy _____________________ _____________________43. The energy associated with an object due to the object’s position relative to the Earth _____________________44. Is the energy associated with an object in motion _____________________45. The human body contains many levers of this type _____________________46. Is the stored energy of an object _____________________47. Formula for kinetic energy _____________________48. The two main types of energy _____________________ _____________________49. The sum of the potential and kinetic energy in a system _____________________50. The two types of potential energy _____________________ _____________________51. Is the energy that lies at the level of atoms and that does not affect motion on a large scale _____________________52. This type of energy is involved in the breaking and forming of chemical bonds _____________________53. List six types of nonmechanical energy _____________________ _____________________ _____________________ _____________________ _____________________ Work & Energy Study Guide Physical Science NAME: ____________________________ Date: __________________ _____________________54. Living things get energy from this _____________________55. It results from the flow of charged particles through wires or other conducting materials _____________________56. States that energy cannot be created or destroyed _____________________57. Light energy from the sun travels from the sun to the Earth in this form _____________________58. A type of reaction in which light atomic nuclei combine to form a heavier nucleus _____________________59. When the flow of energy into and out of a system is small enough that it can be ignored _____________________60. Is one that exchanges energy with the space surrounding it _____________________61. Is the ratio of useful work output to total work input 62. Give an example of each of the six simple machines. 63. The brakes on a bicycle apply 125 N of frictional force to the wheels as the bicycle travels 14.0 m. How much work have the brakes done on the bicycle? Work & Energy Study Guide Physical Science NAME: ____________________________ Date: __________________ 64. While rowing across the lake during a race, John does 3960 J of work on the oars in 60.0 s. What is his power output in watts? 65. A bus driver applies a force of 55.0 N to the steering wheel, which in turn applies 132 N of force on the steering column. What is the mechanical advantage of the steering wheel? 66. Calculate the gravitational potential energy in the following systems: a. a car with a mass of 1200 kg at the top of a 42 m high hill b. a 65 kg climber on top of Mount Everest (8800 m high) c. a 0.52 kg bird flying at an altitude of 550 m Work & Energy Study Guide Physical Science NAME: ____________________________ Date: __________________ 67. What is the kinetic energy in joules of a 0.02 kg bullet traveling 300 m/s? 68. Calculate the kinetic or potential energy in joules for each of the following situations: a. a 2.5 kg book held 2.0 m above the ground b. a 15 g snowball moving through the air at 3.5 m/s c. a 35 kg child sitting at the top of a slide that is 3.5 m above the ground d. an 8500 kg airplane flying at 220 km/h Work & Energy Study Guide Physical Science NAME: ____________________________ Date: __________________ 69. When you do 100 J of work on the handle of a bicycle pump, it does 40 J of work pushing the air into the tire. What is the efficiency of the pump?
