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Motion and Speed

Practice Test
      
  1.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   magnetosphere  
  b.   lithosphere  
  c.   stratosphere  
  d.   core  
  Hint    
      
  2.Motion occurs when an object changes its __________.  
  a.   force  
  b.   mass  
  c.   volume  
  d.   position  
  Hint    
      
  3.__________ is the distance an object travels per unit of time.  
  a.   Displacement  
  b.   Acceleration  
  c.   Velocity  
  d.   Speed  
  Hint    
      
  4.The direction and speed of an object is described by its __________.  
  a.   velocity  
  b.   average displacement  
  c.   displacement  
  d.   average speed  
  Hint    
      
  5.Forces that cancel each other are called __________ forces.  
  a.   neutral  
  b.   null  
  c.   inactivated  
  d.   balanced  
  Hint    
      
  6.Any change over time is called a(n) __________.  
  a.   rate  
  b.   speed  
  c.   acceleration  
  d.   velocity  
  Hint    
      
  7.Average speed is found by __________.  
  a.   dividing total distance traveled by the total time  
  b.   multiplying total distance traveled by the total time  
  c.   dividing the displacement by the total time spent  
  d.   multiplying the displacement by the total time spent  
  Hint    
      
  8.__________ is the change in velocity divided by the time needed for the change to occur.  
  a.   Displacement  
  b.   Average velocity  
  c.   Speed  
  d.   Acceleration  
  Hint    
      
  9.To calculate the distance traveled continuously in a straight line, __________.  
  a.   divide the change in velocity by the time over which the change occurs  
  b.   subtract final position from starting position  
  c.   subtract the time needed to travel the distance by the total distance traveled  
  d.   divide the distance traveled by the time needed to travel the distance  
  Hint    
      
  10.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   motion  
  b.   acceleration  
  c.   velocity  
  d.   force  
  Hint    
      
  11.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.   when a force is applied on an object, there is an equal force applied by the object in the opposite direction  
  c.   when a force acts on an object, its acceleration is in the same direction as the force  
  d.   acceleration is calculated by dividing the force exerted on an object by the mass of the object  
  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.The distance between the final position and the starting position is the __________.  
  a.   acceleration  
  b.   velocity  
  c.   displacement  
  d.   differential  
  Hint    
      
  14.__________ measures an object's tendency to resist changing its motion.  
  a.   Inertia  
  b.   Acceleration  
  c.   Mass  
  d.   Gravity  
  Hint    
      
  15.Which of the following devices is used to indicate instantaneous speed?  
  a.   stopwatch  
  b.   odometer  
  c.   compass  
  d.   speedometer  
  Hint    
      
  16.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.   2.18 h  
  b.   3.14 h  
  c.   5.3 h  
  d.   3.52 h  
  Hint    
      
  17.The SI unit of distance is the __________.  
  a.   meter  
  b.   gram  
  c.   liter  
  d.   mile  
  Hint    
      
  18.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.   3.7 km  
  d.   7.1 km north  
  Hint    
      
  19.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.   8 km/h  
  b.   2 km/h  
  c.   4 km/h  
  d.   2.67 km/h  
  Hint    
      
  20.The __________ is the combination of all the forces acting on an object.  
  a.   force pair  
  b.   inertia  
  c.   direction of motion  
  d.   net force  
  Hint    

 
   
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