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Motion and Speed

Practice Test
      
  1.The SI unit of distance is the __________.  
  a.   gram  
  b.   liter  
  c.   meter  
  d.   mile  
  Hint    
      
  2.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.   when a force is applied on an object, there is an equal force applied by the object in the opposite direction  
  d.   acceleration is calculated by dividing the force exerted on an object by the mass of the object  
  Hint    
      
  3.__________ measures an object's tendency to resist changing its motion.  
  a.   Mass  
  b.   Inertia  
  c.   Gravity  
  d.   Acceleration  
  Hint    
      
  4.Any change over time is called a(n) __________.  
  a.   velocity  
  b.   rate  
  c.   speed  
  d.   acceleration  
  Hint    
      
  5.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   acceleration  
  b.   motion  
  c.   velocity  
  d.   force  
  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  
  b.   7.1 km south  
  c.   3.7 km south  
  d.   7.1 km north  
  Hint    
      
  7.Forces that cancel each other are called __________ forces.  
  a.   inactivated  
  b.   null  
  c.   neutral  
  d.   balanced  
  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.   divide the distance traveled by the time needed to travel the distance  
  c.   subtract final position from starting position  
  d.   subtract the time needed to travel the distance by the total distance traveled  
  Hint    
      
  9.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    
      
  10.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.   11 km  
  d.   10 km  
  Hint    
      
  11.__________ is the distance an object travels per unit of time.  
  a.   Speed  
  b.   Displacement  
  c.   Acceleration  
  d.   Velocity  
  Hint    
      
  12.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    
      
  13.The distance between the final position and the starting position is the __________.  
  a.   differential  
  b.   velocity  
  c.   acceleration  
  d.   displacement  
  Hint    
      
  14.The distance between an object and a reference point is the object's __________.  
  a.   position  
  b.   velocity  
  c.   neutral point  
  d.   displacement  
  Hint    
      
  15.__________ is the speed of an object at any instant of time.  
  a.   Acceleration  
  b.   Average speed  
  c.   Instantaneous speed  
  d.   Velocity  
  Hint    
      
  16.The direction and speed of an object is described by its __________.  
  a.   velocity  
  b.   average displacement  
  c.   average speed  
  d.   displacement  
  Hint    
      
  17.Average speed is found by __________.  
  a.   multiplying the displacement by the total time spent  
  b.   dividing total distance traveled by the total time  
  c.   multiplying total distance traveled by the total time  
  d.   dividing the displacement by the total time spent  
  Hint    
      
  18.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.   5.3 h  
  d.   3.52 h  
  Hint    
      
  19.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    
      
  20.Motion occurs when an object changes its __________.  
  a.   mass  
  b.   force  
  c.   position  
  d.   volume  
  Hint    

 
   
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