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Motion and Speed

Practice Test
      
  1.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    
      
  2.The SI unit of distance is the __________.  
  a.   liter  
  b.   gram  
  c.   meter  
  d.   mile  
  Hint    
      
  3.The direction and speed of an object is described by its __________.  
  a.   average displacement  
  b.   displacement  
  c.   velocity  
  d.   average speed  
  Hint    
      
  4.Any change over time is called a(n) __________.  
  a.   velocity  
  b.   rate  
  c.   speed  
  d.   acceleration  
  Hint    
      
  5.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 km  
  c.   11 km  
  d.   10.5 km  
  Hint    
      
  6.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.   3.7 km  
  c.   7.1 km south  
  d.   7.1 km north  
  Hint    
      
  7.The distance between the final position and the starting position is the __________.  
  a.   differential  
  b.   acceleration  
  c.   displacement  
  d.   velocity  
  Hint    
      
  8.__________ is the speed of an object at any instant of time.  
  a.   Instantaneous speed  
  b.   Acceleration  
  c.   Velocity  
  d.   Average speed  
  Hint    
      
  9.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    
      
  10.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   motion  
  b.   force  
  c.   velocity  
  d.   acceleration  
  Hint    
      
  11.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   lithosphere  
  b.   magnetosphere  
  c.   stratosphere  
  d.   core  
  Hint    
      
  12.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.   riding your bike straight down the street at a constant speed  
  d.   slowing your bike ride so you can make it up a hill  
  Hint    
      
  13.__________ measures an object's tendency to resist changing its motion.  
  a.   Gravity  
  b.   Acceleration  
  c.   Inertia  
  d.   Mass  
  Hint    
      
  14.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.   divide the distance traveled by the time needed to travel the distance  
  d.   subtract final position from starting position  
  Hint    
      
  15.Motion occurs when an object changes its __________.  
  a.   volume  
  b.   force  
  c.   position  
  d.   mass  
  Hint    
      
  16.The distance between an object and a reference point is the object's __________.  
  a.   neutral point  
  b.   velocity  
  c.   position  
  d.   displacement  
  Hint    
      
  17.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    
      
  18.Newton's first law of motion states that __________.  
  a.   when a force is applied on an object, there is an equal force applied by the object in the opposite direction  
  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 acts on an object, its acceleration is in the same direction as the force  
  Hint    
      
  19.Which of the following devices is used to indicate instantaneous speed?  
  a.   odometer  
  b.   speedometer  
  c.   stopwatch  
  d.   compass  
  Hint    
      
  20.__________ is the distance an object travels per unit of time.  
  a.   Acceleration  
  b.   Speed  
  c.   Displacement  
  d.   Velocity  
  Hint    

 
   
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