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Motion and Speed

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

 
   
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