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Motion and Speed

Practice Test
      
  1.The __________ is the combination of all the forces acting on an object.  
  a.   direction of motion  
  b.   force pair  
  c.   net force  
  d.   inertia  
  Hint    
      
  2.Any change over time is called a(n) __________.  
  a.   rate  
  b.   velocity  
  c.   speed  
  d.   acceleration  
  Hint    
      
  3.The SI unit of distance is the __________.  
  a.   liter  
  b.   mile  
  c.   meter  
  d.   gram  
  Hint    
      
  4.Which of the following devices is used to indicate instantaneous speed?  
  a.   speedometer  
  b.   odometer  
  c.   compass  
  d.   stopwatch  
  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.   3.52 h  
  d.   3.14 h  
  Hint    
      
  6.Motion occurs when an object changes its __________.  
  a.   force  
  b.   volume  
  c.   mass  
  d.   position  
  Hint    
      
  7.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.   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    
      
  8.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.   4 km/h  
  d.   2 km/h  
  Hint    
      
  9.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    
      
  10.__________ is the distance an object travels per unit of time.  
  a.   Velocity  
  b.   Speed  
  c.   Displacement  
  d.   Acceleration  
  Hint    
      
  11.__________ is the speed of an object at any instant of time.  
  a.   Instantaneous speed  
  b.   Acceleration  
  c.   Velocity  
  d.   Average speed  
  Hint    
      
  12.The distance between an object and a reference point is the object's __________.  
  a.   velocity  
  b.   displacement  
  c.   neutral point  
  d.   position  
  Hint    
      
  13.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   motion  
  b.   acceleration  
  c.   velocity  
  d.   force  
  Hint    
      
  14.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    
      
  15.Which of the following is not an acceleration?  
  a.   stopping your bike at an intersection  
  b.   riding your bike straight down the street at a constant speed  
  c.   slowing your bike ride so you can make it up a hill  
  d.   riding your bike faster when you ride down a hill  
  Hint    
      
  16.The distance between the final position and the starting position is the __________.  
  a.   velocity  
  b.   acceleration  
  c.   displacement  
  d.   differential  
  Hint    
      
  17.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   lithosphere  
  b.   magnetosphere  
  c.   core  
  d.   stratosphere  
  Hint    
      
  18.__________ 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    
      
  19.The direction and speed of an object is described by its __________.  
  a.   average displacement  
  b.   displacement  
  c.   velocity  
  d.   average speed  
  Hint    
      
  20.__________ measures an object's tendency to resist changing its motion.  
  a.   Acceleration  
  b.   Gravity  
  c.   Inertia  
  d.   Mass  
  Hint    

 
   
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