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Quizzes Quiz
Work and Simple Machines

Practice Test
  1.On what point does a lever pivot?  
  a.   the fulcrum  
  b.   the end  
  c.   the arm  
  d.   the middle  
  2.A drill bit is an example of which type of machine?  
  a.   screw  
  b.   pulley  
  c.   lever  
  d.   wheel and axle  
  3.A chisel is an example of which machine?  
  a.   pulley  
  b.   lever  
  c.   wedge  
  d.   wheel and axle  
  4.The efficiency of all machines is __________.  
  a.   more than 100 percent  
  b.   impossible to calculate  
  c.   exactly 100 percent  
  d.   less than 100 percent  
  5.Which simple machines are found on a hammer?  
  a.   wedge and plane  
  b.   screw and pulley  
  c.   lever only  
  d.   plane and lever  
  6.When the pyramids were built, blocks were lifted from a quarry and moved across the desert. When was work done in a scientific sense?  
  a.   No work was done in a scientific sense.  
  b.   moving the blocks across the desert  
  c.   lifting the blocks  
  d.   when lifting the blocks and when moving them across the desert  
  7.When you climb stairs and then walk down a hallway, in which direction is the work done?  
  a.   in the opposite direction that you walk  
  b.   along the hallway  
  c.   upward  
  d.   downward  
  8.What is a sign that work is being done?  
  a.   matter  
  b.   motion  
  c.   density  
  d.   mass  
  9.A ramp in a building is an example of which machine?  
  a.   pulley  
  b.   inclined plane  
  c.   wedge  
  d.   lever  
  10.A 5,000 N block was lifted 10 m. How much work was done?  
  a.   50 J  
  b.   5,000 J  
  c.   500 J  
  d.   50,000 J  
  11.What is the scientific formula for work?  
  a.   W = F/d  
  b.   W = F + d  
  c.   W = F x d  
  d.   W = F - d  
  12.Using an inclined plane allows you to apply __________.  
  a.   the same force  
  b.   a greater force  
  c.   a lesser force  
  d.   no force  
  13.Which is an example of work being done in a scientific sense?  
  a.   carrying a box  
  b.   lifting a box  
  c.   pushing against a stationary box  
  d.   doing homework  
  14.What happens to the total amount of work done when you use a machine compared to not using a machine?  
  a.   It goes to zero.  
  b.   It stays the same.  
  c.   It decreases.  
  d.   It increases.  
  15.What is transferred when work is done?  
  a.   matter  
  b.   mass  
  c.   energy  
  d.   velocity  
  16.Using several pulleys together is known as a __________.  
  a.   pulley group  
  b.   wheel and axle  
  c.   machine system  
  d.   pulley system  
  17.The unit for work is a joule, which is equal to __________.  
  a.   N/m  
  b.   N - m  
  c.   N + m  
  d.   N x m  
  18.Power is measured by which units?  
  a.   joules  
  b.   newtons  
  c.   watts  
  d.   newton-meters  
  19.Name the four simple machines.  
  a.   screw, lever, wedge, and plane  
  b.   plane, lever, screw, and wedge  
  c.   inclined plane, lever, wheel and axle, and pulley  
  d.   wedge, lever, pulley, and wheel  
  20.How do input force and output force relate to each other?  
  a.   They are unrelated.  
  b.   They are always different.  
  c.   The input is always less than the output.  
  d.   They are the same.  

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