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Motion and Speed

Practice Test
      
  1.If a student leaves home at 7:30 AM to walk to his school 2 km away, stops at a neighbor's house for 15 min, then arrives at school at 8:00 AM, what is the student's average speed for the trip to school?  
  a.   4 km/h  
  b.   2.67 km/h  
  c.   2 km/h  
  d.   8 km/h  
  Hint    
      
  2.The distance between the final position and the starting position is the __________.  
  a.   differential  
  b.   displacement  
  c.   velocity  
  d.   acceleration  
  Hint    
      
  3.__________ is the change in velocity divided by the time needed for the change to occur.  
  a.   Displacement  
  b.   Acceleration  
  c.   Average velocity  
  d.   Speed  
  Hint    
      
  4.Motion occurs when an object changes its __________.  
  a.   position  
  b.   volume  
  c.   mass  
  d.   force  
  Hint    
      
  5.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   force  
  b.   velocity  
  c.   motion  
  d.   acceleration  
  Hint    
      
  6.The __________ is the combination of all the forces acting on an object.  
  a.   force pair  
  b.   direction of motion  
  c.   net force  
  d.   inertia  
  Hint    
      
  7.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   magnetosphere  
  b.   lithosphere  
  c.   stratosphere  
  d.   core  
  Hint    
      
  8.__________ measures an object's tendency to resist changing its motion.  
  a.   Inertia  
  b.   Acceleration  
  c.   Gravity  
  d.   Mass  
  Hint    
      
  9.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 south  
  b.   3.7 km south  
  c.   7.1 km north  
  d.   3.7 km  
  Hint    
      
  10.__________ is the speed of an object at any instant of time.  
  a.   Instantaneous speed  
  b.   Average speed  
  c.   Acceleration  
  d.   Velocity  
  Hint    
      
  11.Any change over time is called a(n) __________.  
  a.   speed  
  b.   velocity  
  c.   rate  
  d.   acceleration  
  Hint    
      
  12.The distance between an object and a reference point is the object's __________.  
  a.   displacement  
  b.   neutral point  
  c.   position  
  d.   velocity  
  Hint    
      
  13.Which of the following devices is used to indicate instantaneous speed?  
  a.   compass  
  b.   speedometer  
  c.   odometer  
  d.   stopwatch  
  Hint    
      
  14.Average speed is found by __________.  
  a.   multiplying total distance traveled by the total time  
  b.   dividing total distance traveled by the total time  
  c.   multiplying the displacement by the total time spent  
  d.   dividing the displacement by the total time spent  
  Hint    
      
  15.Which of the following is not an acceleration?  
  a.   stopping your bike at an intersection  
  b.   riding your bike straight down the street at a constant speed  
  c.   slowing your bike ride so you can make it up a hill  
  d.   riding your bike faster when you ride down a hill  
  Hint    
      
  16.The direction and speed of an object is described by its __________.  
  a.   displacement  
  b.   average displacement  
  c.   velocity  
  d.   average speed  
  Hint    
      
  17.Forces that cancel each other are called __________ forces.  
  a.   inactivated  
  b.   balanced  
  c.   neutral  
  d.   null  
  Hint    
      
  18.__________ is the distance an object travels per unit of time.  
  a.   Displacement  
  b.   Acceleration  
  c.   Velocity  
  d.   Speed  
  Hint    
      
  19.The SI unit of distance is the __________.  
  a.   liter  
  b.   gram  
  c.   mile  
  d.   meter  
  Hint    
      
  20.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.   3.14 h  
  b.   2.18 h  
  c.   3.52 h  
  d.   5.3 h  
  Hint    

 
   
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