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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.   net force  
  d.   direction of motion  
  2.__________ is the speed of an object at any instant of time.  
  a.   Acceleration  
  b.   Velocity  
  c.   Average speed  
  d.   Instantaneous speed  
  3.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  
  4.To calculate the distance traveled continuously in a straight line, __________.  
  a.   subtract the time needed to travel the distance by the total distance traveled  
  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 final position from starting position  
  5.The distance between the final position and the starting position is the __________.  
  a.   displacement  
  b.   velocity  
  c.   differential  
  d.   acceleration  
  6.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   velocity  
  b.   force  
  c.   acceleration  
  d.   motion  
  7.The distance between an object and a reference point is the object's __________.  
  a.   neutral point  
  b.   displacement  
  c.   position  
  d.   velocity  
  8.__________ measures an object's tendency to resist changing its motion.  
  a.   Gravity  
  b.   Acceleration  
  c.   Mass  
  d.   Inertia  
  9.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  
  10.Which of the following devices is used to indicate instantaneous speed?  
  a.   stopwatch  
  b.   odometer  
  c.   compass  
  d.   speedometer  
  11.Forces that cancel each other are called __________ forces.  
  a.   inactivated  
  b.   null  
  c.   neutral  
  d.   balanced  
  12.The direction and speed of an object is described by its __________.  
  a.   displacement  
  b.   velocity  
  c.   average displacement  
  d.   average speed  
  13.The SI unit of distance is the __________.  
  a.   meter  
  b.   gram  
  c.   mile  
  d.   liter  
  14.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   magnetosphere  
  b.   core  
  c.   lithosphere  
  d.   stratosphere  
  15.Motion occurs when an object changes its __________.  
  a.   position  
  b.   mass  
  c.   volume  
  d.   force  
  16.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 straight down the street at a constant speed  
  c.   stopping your bike at an intersection  
  d.   riding your bike faster when you ride down a hill  
  17.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.   10.5 km  
  b.   11 km  
  c.   10 km  
  d.   2.8 km/h  
  18.Average speed is found by __________.  
  a.   dividing total distance traveled by the total time  
  b.   multiplying the displacement by the total time spent  
  c.   multiplying total distance traveled by the total time  
  d.   dividing the displacement by the total time spent  
  19.__________ is the change in velocity divided by the time needed for the change to occur.  
  a.   Acceleration  
  b.   Average velocity  
  c.   Speed  
  d.   Displacement  
  20.__________ is the distance an object travels per unit of time.  
  a.   Displacement  
  b.   Acceleration  
  c.   Speed  
  d.   Velocity  

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