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      Ch 8 Work, Power, & Machines on QuizRevolution


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      Ch 8 Work, Power, & Machines
      myStudiyo Media
      Question
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      Ch 8 Work, Power, & Machines
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      A knife is an example of what type of simple machine?
      Wrong
       of players answered correctly.
      • lever

      • wedge

      • gear

      • ramp

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      Comments:
      1. A knife is an example of what type of simple machine?
        1. lever
        2. wedge
        3. gear
        4. ramp
      2. A slanted road is an example of what type of simple machine?
        1. lever
        2. inclined plane
        3. wedge
        4. wheel and axle
      3. Does an object with energy always have momentum?
        1. yes
        2. no
      4. The force that is placed on the simple machine to move the object is called _
        1. load
        2. output force
        3. effort force
        4. work
      5. A zipper is an example of a __.
        1. wedge
        2. lever
        3. inclined plane
        4. screw
      6. a device used for increasing a force or simply changing direction of a force is a __
        1. simple machine
        2. compound machine
        3. machine
        4. mechanism
      7. is the mechanical advantage without friction
        1. actual mechanical advantage
        2. ideal mechanical advantage
        3. geometric mechanical advantage
        4. realistic mechanical advantage
      8. A lightbulb or jar lids are examples of what type of simple machine?
        1. wheel and axle
        2. pulley
        3. lever
        4. screw
      9. A door knob is an example of __.
        1. lever
        2. wheel and axle
        3. pulley
        4. screw
      10. The weight being lifted by the simple machine is called __.
        1. object
        2. effort force
        3. load
        4. input force
      11. Simple Machines make you more powerful
        1. true
        2. false
      12. Which uses more work: lifting 50kg up 2meters or 25kg up 4meters?
        1. lifting the 50 kg object
        2. lifting the 25 kg object
        3. both require the same amount of work (W=Fd)
      13. If you double an object's velocity then the KE __.
        1. doubles
        2. halves
        3. quadruples
        4. remains the same
      14. A diver on a 10 meter diving board has 10,000J of PE. After falling 10 meters the diver
        1. has 10,000 J PE
        2. has 7500 J PE
        3. has 5000 J PE
        4. has 0 J PE
      15. The amount of potential energy possessed by an elevated object is equal to __.
        1. the force needed to lift it
        2. the distance it is lifted
        3. the power used to lift it
        4. the work done to lift it
      16. A diver on a 10 meter diving board has 10,000J of PE. After falling 10 meters the diver
        1. has 10,000 J KE
        2. has 7500 J KE
        3. has 5000 J KE
        4. has 0 J KE
      17. A bow of a boat is an example of what type of simple machine?
        1. lever
        2. ramp
        3. wedge
        4. screw
      18. rod or board that pivots is a __.
        1. lever
        2. ramp
        3. wheel and axle
        4. pulley
      19. inclined plane wrapped around a cylinder is called __.
        1. ramp
        2. screw
        3. wheel and axle
        4. pulley
      20. A job done slowly, and an identical job is done quickly.
        1. energy
        2. power
        3. both energy & power
        4. neither energy or power
      21. A stapler is __.
        1. a simple machine
        2. a compound machine
        3. a complex machine
        4. not a machine
      22. mechanical advantage that takes friction into consideration is _.
        1. actual mechanical advantage
        2. ideal mechanical advantage
        3. geometric mechanical advantage
        4. realistic mechanical advantage
      23. A moving car has 2000J of kinetic energy. If the car’s velocity doubles, then the KE = ___
        1. 8000 Joules
        2. 4000 Joules
        3. 2000 Joules
        4. 1000 Joules
      24. Energy can never be created nor destroyed but it can be transformed from 1 type to another
        1. true
        2. false
      25. the % of the work input that is converted to work output
        1. actual mechanical advantage
        2. ideal mechanical advantage
        3. efficiency
        4. accuracy
      26. Does an object with momentum always have energy?
        1. yes
        2. no
      27. You push on a wall and the wall does not move...
        1. work is done on the wall
        2. work is not done on the wall
        3. not enough info to say
      28. sloped surface used to change the effort force & distance is __.
        1. ramp
        2. screw
        3. lever
        4. wedge
      29. some Energy is always transformed into heat & no machine can ever be 100% efficient
        1. true
        2. false
      30. A door on a hinge is an example of __.
        1. inclined plane
        2. wheel and axle
        3. lever
        4. wedge
      31. wheel with a groove on outside for a rope to move around it is a __.
        1. wheel and axle
        2. screw
        3. gear
        4. pulley
      32. Simple Machines do not change the direction of the effort force
        1. true
        2. false
      33. A wheelbarrel is __.
        1. a simple machine
        2. a compound machine
        3. a complex machine
        4. not a machine
      34. A spiral staircase is an example of a __.
        1. wedge
        2. ramp
        3. screw
        4. ramp
      35. ratio that tells you how many times the machine multiplies force you put into the machine
        1. actual mechanical advantage
        2. ideal mechanical advantage
        3. geometric mechanical advantage
        4. realistic mechanical advantage
      36. A staple is an example of what type of simple machine?
        1. lever
        2. ramp
        3. wedge
        4. gear
      37. Simple machines decrease the amount of work you do.
        1. true
        2. false
      38. A staircase is an example of a __.
        1. inclined plane
        2. screw
        3. lever
        4. wedge
      39. . toothed wheel that fit together used to transfer energy/work/movement is called __
        1. pulley
        2. screw
        3. wheel and axle
        4. gear
      40. A flag pole is an example of what type of simple machine?
        1. pulley
        2. wheel and axle
        3. gear
        4. screw
      41. A diver on a 10 meter diving board has 10,000J of PE. After falling 7.5 meters the diver
        1. has 10,000 J KE
        2. has 7500 J KE
        3. has 5000 J KE
        4. has 2500 J KE
      42. A diver on a 10 meter diving board has 10,000J of PE. After falling 7.5 meters the diver
        1. has 10,000 J PE
        2. has 7500 J PE
        3. has 5000 J PE
        4. has 2500 J PE
      43. A broom is an example of what type of simple machine?
        1. lever
        2. ramp
        3. wedge
        4. inclined plane
      44. 2 inclined planes joined back to back is a __.
        1. ramp
        2. lever
        3. wedge
        4. wheel & axle
      45. If you triple an object's velocity then the KE __.
        1. increases by a factor of 3
        2. decreases by a factor of 3
        3. increases by a factor of 6
        4. increases by a factor of 9
      46. A nut cracker is an example of what type of simple machine?
        1. inclined plane
        2. wheel and axle
        3. gear
        4. lever
      47. mechanical advantage based only on the geometry of the machine
        1. actual mechanical advantage
        2. ideal mechanical advantage
        3. geometric mechanical advantage
        4. realistic mechanical advantage
      48. the pivot point for a lever is called __.
        1. axle
        2. joint
        3. fulcrum
        4. fulcrest
      49. another name for a combination pulley is a __.
        1. blocking pulley
        2. block and tackle
        3. fixed pulley
        4. movable pulley
      50. the total mechanical energy is equal to the sum of potential energy and kinetic energy
        1. true
        2. false
      51. Work is defined as __.
        1. force times time
        2. force divided by time
        3. force times distance
        4. force divided by distance
      52. the ratio of useful energy output to total energy input
        1. actual mechanical advantage
        2. ideal mechanical advantage
        3. efficiency
        4. accuracy
      53. Mini-blinds are examples of a __.
        1. wheel and axle
        2. pulley
        3. screw
        4. lever
      54. Power is defined as the __.
        1. rate at which work is done
        2. equal to the work done divided by time
        3. change in energy divided by time
        4. all of the above
      55. A diver on a 10 meter diving board has 10,000J of PE. After falling 5 meters the diver
        1. has 10,000 J PE
        2. has 7500 J PE
        3. has 5000 J PE
        4. has 0 J PE

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