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Motion and Speed

Practice Test
      
  1.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.   7.1 km north  
  c.   3.7 km  
  d.   3.7 km south  
  Hint    
      
  2.The __________ is the combination of all the forces acting on an object.  
  a.   force pair  
  b.   net force  
  c.   direction of motion  
  d.   inertia  
  Hint    
      
  3.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   core  
  b.   magnetosphere  
  c.   lithosphere  
  d.   stratosphere  
  Hint    
      
  4.The SI unit of distance is the __________.  
  a.   liter  
  b.   mile  
  c.   gram  
  d.   meter  
  Hint    
      
  5.The direction and speed of an object is described by its __________.  
  a.   average displacement  
  b.   displacement  
  c.   velocity  
  d.   average speed  
  Hint    
      
  6.Which of the following devices is used to indicate instantaneous speed?  
  a.   speedometer  
  b.   compass  
  c.   odometer  
  d.   stopwatch  
  Hint    
      
  7.The distance between an object and a reference point is the object's __________.  
  a.   velocity  
  b.   neutral point  
  c.   displacement  
  d.   position  
  Hint    
      
  8.Motion occurs when an object changes its __________.  
  a.   mass  
  b.   volume  
  c.   position  
  d.   force  
  Hint    
      
  9.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 km/h  
  c.   2.67 km/h  
  d.   8 km/h  
  Hint    
      
  10.__________ is the speed of an object at any instant of time.  
  a.   Average speed  
  b.   Acceleration  
  c.   Velocity  
  d.   Instantaneous speed  
  Hint    
      
  11.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.   11 km  
  b.   10.5 km  
  c.   2.8 km/h  
  d.   10 km  
  Hint    
      
  12.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   velocity  
  b.   force  
  c.   acceleration  
  d.   motion  
  Hint    
      
  13.__________ measures an object's tendency to resist changing its motion.  
  a.   Acceleration  
  b.   Mass  
  c.   Gravity  
  d.   Inertia  
  Hint    
      
  14.Which of the following is not an acceleration?  
  a.   slowing your bike ride so you can make it up a hill  
  b.   riding your bike faster when you ride down a hill  
  c.   riding your bike straight down the street at a constant speed  
  d.   stopping your bike at an intersection  
  Hint    
      
  15.__________ is the distance an object travels per unit of time.  
  a.   Displacement  
  b.   Acceleration  
  c.   Speed  
  d.   Velocity  
  Hint    
      
  16.To calculate the distance traveled continuously in a straight line, __________.  
  a.   subtract final position from starting position  
  b.   divide the change in velocity by the time over which the change occurs  
  c.   divide the distance traveled by the time needed to travel the distance  
  d.   subtract the time needed to travel the distance by the total distance traveled  
  Hint    
      
  17.__________ is the change in velocity divided by the time needed for the change to occur.  
  a.   Acceleration  
  b.   Average velocity  
  c.   Displacement  
  d.   Speed  
  Hint    
      
  18.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    
      
  19.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.   acceleration is calculated by dividing the force exerted on an object by the mass of the object  
  c.   an object will remain at rest or keep moving unless a force acts on it  
  d.   when a force is applied on an object, there is an equal force applied by the object in the opposite direction  
  Hint    
      
  20.Forces that cancel each other are called __________ forces.  
  a.   neutral  
  b.   balanced  
  c.   null  
  d.   inactivated  
  Hint    

 
   
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