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Motion and Speed

Practice Test
      
  1.The direction and speed of an object is described by its __________.  
  a.   average speed  
  b.   displacement  
  c.   average displacement  
  d.   velocity  
  Hint    
      
  2.Which of the following devices is used to indicate instantaneous speed?  
  a.   compass  
  b.   speedometer  
  c.   stopwatch  
  d.   odometer  
  Hint    
      
  3.The __________ is the combination of all the forces acting on an object.  
  a.   net force  
  b.   inertia  
  c.   force pair  
  d.   direction of motion  
  Hint    
      
  4.The distance between the final position and the starting position is the __________.  
  a.   displacement  
  b.   differential  
  c.   velocity  
  d.   acceleration  
  Hint    
      
  5.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   core  
  b.   magnetosphere  
  c.   stratosphere  
  d.   lithosphere  
  Hint    
      
  6.__________ is the speed of an object at any instant of time.  
  a.   Instantaneous speed  
  b.   Average speed  
  c.   Velocity  
  d.   Acceleration  
  Hint    
      
  7.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   velocity  
  b.   force  
  c.   acceleration  
  d.   motion  
  Hint    
      
  8.__________ measures an object's tendency to resist changing its motion.  
  a.   Inertia  
  b.   Mass  
  c.   Acceleration  
  d.   Gravity  
  Hint    
      
  9.The SI unit of distance is the __________.  
  a.   mile  
  b.   gram  
  c.   meter  
  d.   liter  
  Hint    
      
  10.If you travel 1.7 km north from your house at noon, and at 6:00 PM you travel 5.4 km south, what is your displacement?  
  a.   7.1 km north  
  b.   3.7 km south  
  c.   3.7 km  
  d.   7.1 km south  
  Hint    
      
  11.Average speed is found by __________.  
  a.   multiplying the displacement by the total time spent  
  b.   dividing the displacement by the total time spent  
  c.   multiplying total distance traveled by the total time  
  d.   dividing total distance traveled by the total time  
  Hint    
      
  12.At 8:00 AM you leave home and walk 0.5 km to a friend's house. At 11:30 AM you return home, then travel by car to the mall, which is 10 km away, and arrive at 11:45 AM. What is the total distance traveled?  
  a.   2.8 km/h  
  b.   11 km  
  c.   10 km  
  d.   10.5 km  
  Hint    
      
  13.Motion occurs when an object changes its __________.  
  a.   force  
  b.   mass  
  c.   position  
  d.   volume  
  Hint    
      
  14.Forces that cancel each other are called __________ forces.  
  a.   null  
  b.   neutral  
  c.   inactivated  
  d.   balanced  
  Hint    
      
  15.__________ is the distance an object travels per unit of time.  
  a.   Displacement  
  b.   Velocity  
  c.   Acceleration  
  d.   Speed  
  Hint    
      
  16.Which of the following is not an acceleration?  
  a.   riding your bike faster when you ride down a hill  
  b.   stopping your bike at an intersection  
  c.   slowing your bike ride so you can make it up a hill  
  d.   riding your bike straight down the street at a constant speed  
  Hint    
      
  17.__________ is the change in velocity divided by the time needed for the change to occur.  
  a.   Speed  
  b.   Average velocity  
  c.   Acceleration  
  d.   Displacement  
  Hint    
      
  18.If a runner maintains a constant speed of 12 km/h, how long will it take to complete a marathon race of 26.2 miles?  
  a.   5.3 h  
  b.   2.18 h  
  c.   3.14 h  
  d.   3.52 h  
  Hint    
      
  19.Any change over time is called a(n) __________.  
  a.   acceleration  
  b.   velocity  
  c.   speed  
  d.   rate  
  Hint    
      
  20.Newton's first law of motion states that __________.  
  a.   an object will remain at rest or keep moving unless a force acts on it  
  b.   acceleration is calculated by dividing the force exerted on an object by the mass of the object  
  c.   when a force is applied on an object, there is an equal force applied by the object in the opposite direction  
  d.   when a force acts on an object, its acceleration is in the same direction as the force  
  Hint    

 
   
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