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Motion and Speed

Practice Test
      
  1.__________ is the speed of an object at any instant of time.  
  a.   Average speed  
  b.   Velocity  
  c.   Acceleration  
  d.   Instantaneous speed  
  Hint    
      
  2.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    
      
  3.Which of the following is not an acceleration?  
  a.   riding your bike straight down the street at a constant speed  
  b.   riding your bike faster when you ride down a hill  
  c.   stopping your bike at an intersection  
  d.   slowing your bike ride so you can make it up a hill  
  Hint    
      
  4.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.   3.52 h  
  c.   3.14 h  
  d.   5.3 h  
  Hint    
      
  5.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   core  
  b.   stratosphere  
  c.   magnetosphere  
  d.   lithosphere  
  Hint    
      
  6.Forces that cancel each other are called __________ forces.  
  a.   inactivated  
  b.   null  
  c.   neutral  
  d.   balanced  
  Hint    
      
  7.Which of the following devices is used to indicate instantaneous speed?  
  a.   odometer  
  b.   speedometer  
  c.   compass  
  d.   stopwatch  
  Hint    
      
  8.__________ is the distance an object travels per unit of time.  
  a.   Speed  
  b.   Velocity  
  c.   Acceleration  
  d.   Displacement  
  Hint    
      
  9.Any change over time is called a(n) __________.  
  a.   rate  
  b.   speed  
  c.   acceleration  
  d.   velocity  
  Hint    
      
  10.Motion occurs when an object changes its __________.  
  a.   force  
  b.   position  
  c.   mass  
  d.   volume  
  Hint    
      
  11.The direction and speed of an object is described by its __________.  
  a.   velocity  
  b.   average speed  
  c.   average displacement  
  d.   displacement  
  Hint    
      
  12.The __________ is the combination of all the forces acting on an object.  
  a.   net force  
  b.   inertia  
  c.   direction of motion  
  d.   force pair  
  Hint    
      
  13.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    
      
  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.   divide the distance traveled by the time needed to travel the distance  
  c.   subtract the time needed to travel the distance by the total distance traveled  
  d.   subtract final position from starting position  
  Hint    
      
  15.The distance between an object and a reference point is the object's __________.  
  a.   displacement  
  b.   neutral point  
  c.   velocity  
  d.   position  
  Hint    
      
  16.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   velocity  
  b.   force  
  c.   acceleration  
  d.   motion  
  Hint    
      
  17.The distance between the final position and the starting position is the __________.  
  a.   velocity  
  b.   displacement  
  c.   acceleration  
  d.   differential  
  Hint    
      
  18.__________ measures an object's tendency to resist changing its motion.  
  a.   Acceleration  
  b.   Inertia  
  c.   Mass  
  d.   Gravity  
  Hint    
      
  19.__________ is the change in velocity divided by the time needed for the change to occur.  
  a.   Average velocity  
  b.   Speed  
  c.   Displacement  
  d.   Acceleration  
  Hint    
      
  20.Newton's first law of motion states that __________.  
  a.   an object will remain at rest or keep moving unless a force acts on it  
  b.   when a force is applied on an object, there is an equal force applied by the object in the opposite direction  
  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    

 
   
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