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Motion and Speed

Practice Test
      
  1.__________ is the speed of an object at any instant of time.  
  a.   Instantaneous speed  
  b.   Velocity  
  c.   Average speed  
  d.   Acceleration  
  Hint    
      
  2.__________ measures an object's tendency to resist changing its motion.  
  a.   Acceleration  
  b.   Gravity  
  c.   Mass  
  d.   Inertia  
  Hint    
      
  3.__________ is the change in velocity divided by the time needed for the change to occur.  
  a.   Acceleration  
  b.   Average velocity  
  c.   Speed  
  d.   Displacement  
  Hint    
      
  4.The direction and speed of an object is described by its __________.  
  a.   average displacement  
  b.   average speed  
  c.   displacement  
  d.   velocity  
  Hint    
      
  5.The __________ is the combination of all the forces acting on an object.  
  a.   inertia  
  b.   force pair  
  c.   direction of motion  
  d.   net force  
  Hint    
      
  6.Newton's first law of motion states that __________.  
  a.   when a force acts on an object, its acceleration is in the same direction as the force  
  b.   when a force is applied on an object, there is an equal force applied by the object in the opposite direction  
  c.   acceleration is calculated by dividing the force exerted on an object by the mass of the object  
  d.   an object will remain at rest or keep moving unless a force acts on it  
  Hint    
      
  7.Motion occurs when an object changes its __________.  
  a.   volume  
  b.   force  
  c.   mass  
  d.   position  
  Hint    
      
  8.__________ is the distance an object travels per unit of time.  
  a.   Velocity  
  b.   Acceleration  
  c.   Displacement  
  d.   Speed  
  Hint    
      
  9.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   motion  
  b.   velocity  
  c.   acceleration  
  d.   force  
  Hint    
      
  10.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.   divide the distance traveled by the time needed to travel the distance  
  c.   subtract the time needed to travel the distance by the total distance traveled  
  d.   subtract final position from starting position  
  Hint    
      
  11.The distance between an object and a reference point is the object's __________.  
  a.   position  
  b.   displacement  
  c.   neutral point  
  d.   velocity  
  Hint    
      
  12.Which of the following devices is used to indicate instantaneous speed?  
  a.   odometer  
  b.   stopwatch  
  c.   compass  
  d.   speedometer  
  Hint    
      
  13.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.   2 km/h  
  b.   4 km/h  
  c.   2.67 km/h  
  d.   8 km/h  
  Hint    
      
  14.Any change over time is called a(n) __________.  
  a.   velocity  
  b.   rate  
  c.   acceleration  
  d.   speed  
  Hint    
      
  15.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   core  
  b.   magnetosphere  
  c.   stratosphere  
  d.   lithosphere  
  Hint    
      
  16.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.   10 km  
  b.   2.8 km/h  
  c.   10.5 km  
  d.   11 km  
  Hint    
      
  17.Forces that cancel each other are called __________ forces.  
  a.   neutral  
  b.   inactivated  
  c.   balanced  
  d.   null  
  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.   3.7 km south  
  b.   7.1 km south  
  c.   3.7 km  
  d.   7.1 km north  
  Hint    
      
  19.The distance between the final position and the starting position is the __________.  
  a.   velocity  
  b.   displacement  
  c.   acceleration  
  d.   differential  
  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.   3.52 h  
  b.   5.3 h  
  c.   2.18 h  
  d.   3.14 h  
  Hint    

 
   
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