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Work and Simple Machines

Practice Test
      
  1.Name the four simple machines.  
  a.   inclined plane, lever, wheel and axle, and pulley  
  b.   wedge, lever, pulley, and wheel  
  c.   plane, lever, screw, and wedge  
  d.   screw, lever, wedge, and plane  
  Hint    
      
  2.What is transferred when work is done?  
  a.   mass  
  b.   energy  
  c.   matter  
  d.   velocity  
  Hint    
      
  3.What happens to the total amount of work done when you use a machine compared to not using a machine?  
  a.   It decreases.  
  b.   It goes to zero.  
  c.   It increases.  
  d.   It stays the same.  
  Hint    
      
  4.What is a sign that work is being done?  
  a.   mass  
  b.   motion  
  c.   density  
  d.   matter  
  Hint    
      
  5.A 5,000 N block was lifted 10 m. How much work was done?  
  a.   500 J  
  b.   5,000 J  
  c.   50,000 J  
  d.   50 J  
  Hint    
      
  6.Which of the following do you think a wheel and axle is most closely related to?  
  a.   inclined plane  
  b.   lever  
  c.   pulley  
  d.   wedge  
  Hint    
      
  7.Using an inclined plane allows you to apply __________.  
  a.   the same force  
  b.   no force  
  c.   a greater force  
  d.   a lesser force  
  Hint    
      
  8.A ramp in a building is an example of which machine?  
  a.   wedge  
  b.   inclined plane  
  c.   lever  
  d.   pulley  
  Hint    
      
  9.A chisel is an example of which machine?  
  a.   wedge  
  b.   pulley  
  c.   wheel and axle  
  d.   lever  
  Hint    
      
  10.How do input force and output force relate to each other?  
  a.   The input is always less than the output.  
  b.   They are unrelated.  
  c.   They are the same.  
  d.   They are always different.  
  Hint    
      
  11.Which simple machines are found on a hammer?  
  a.   plane and lever  
  b.   wedge and plane  
  c.   lever only  
  d.   screw and pulley  
  Hint    
      
  12.On what point does a lever pivot?  
  a.   the arm  
  b.   the fulcrum  
  c.   the end  
  d.   the middle  
  Hint    
      
  13.When you climb stairs and then walk down a hallway, in which direction is the work done?  
  a.   upward  
  b.   downward  
  c.   in the opposite direction that you walk  
  d.   along the hallway  
  Hint    
      
  14.What is the mechanical advantage if 50 J are put in and 200 J are produced?  
  a.   200  
  b.   1000  
  c.   50  
  d.   4  
  Hint    
      
  15.What does a screw consist of?  
  a.   a wheel and axle in a vertical position  
  b.   a wedge wrapped around a pipe  
  c.   an inclined plane wrapped around a cylinder  
  d.   a lever wrapped around a pole  
  Hint    
      
  16.Using several pulleys together is known as a __________.  
  a.   pulley system  
  b.   wheel and axle  
  c.   machine system  
  d.   pulley group  
  Hint    
      
  17.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.   moving the blocks across the desert  
  b.   when lifting the blocks and when moving them across the desert  
  c.   No work was done in a scientific sense.  
  d.   lifting the blocks  
  Hint    
      
  18.Which is an example of work being done in a scientific sense?  
  a.   carrying a box  
  b.   lifting a box  
  c.   doing homework  
  d.   pushing against a stationary box  
  Hint    
      
  19.Power is measured by which units?  
  a.   newton-meters  
  b.   newtons  
  c.   watts  
  d.   joules  
  Hint    
      
  20.What is the scientific formula for work?  
  a.   W = F + d  
  b.   W = F/d  
  c.   W = F x d  
  d.   W = F - d  
  Hint    

 
   
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