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Motion and Speed

Practice Test
  1.The distance between an object and a reference point is the object's __________.  
  a.   position  
  b.   velocity  
  c.   neutral point  
  d.   displacement  
  2.Forces that cancel each other are called __________ forces.  
  a.   neutral  
  b.   balanced  
  c.   inactivated  
  d.   null  
  3.__________ measures an object's tendency to resist changing its motion.  
  a.   Mass  
  b.   Inertia  
  c.   Acceleration  
  d.   Gravity  
  4.The __________ is the combination of all the forces acting on an object.  
  a.   direction of motion  
  b.   net force  
  c.   force pair  
  d.   inertia  
  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.   3.14 h  
  c.   3.52 h  
  d.   5.3 h  
  6.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  
  7.__________ is the speed of an object at any instant of time.  
  a.   Acceleration  
  b.   Instantaneous speed  
  c.   Velocity  
  d.   Average speed  
  8.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 south  
  b.   7.1 km south  
  c.   3.7 km  
  d.   7.1 km north  
  9.The SI unit of distance is the __________.  
  a.   mile  
  b.   gram  
  c.   meter  
  d.   liter  
  10.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.   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.   an object will remain at rest or keep moving unless a force acts on it  
  11.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.   2 km/h  
  c.   4 km/h  
  d.   8 km/h  
  12.The distance between the final position and the starting position is the __________.  
  a.   acceleration  
  b.   displacement  
  c.   velocity  
  d.   differential  
  13.Any change over time is called a(n) __________.  
  a.   speed  
  b.   rate  
  c.   velocity  
  d.   acceleration  
  14.Motion occurs when an object changes its __________.  
  a.   mass  
  b.   position  
  c.   force  
  d.   volume  
  15.__________ is the change in velocity divided by the time needed for the change to occur.  
  a.   Speed  
  b.   Acceleration  
  c.   Displacement  
  d.   Average velocity  
  16.__________ is the distance an object travels per unit of time.  
  a.   Displacement  
  b.   Velocity  
  c.   Speed  
  d.   Acceleration  
  17.Which of the following is not an acceleration?  
  a.   riding your bike straight down the street at a constant speed  
  b.   stopping your bike at an intersection  
  c.   slowing your bike ride so you can make it up a hill  
  d.   riding your bike faster when you ride down a hill  
  18.Average speed is found by __________.  
  a.   multiplying total distance traveled by the total time  
  b.   dividing 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  
  19.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   core  
  b.   magnetosphere  
  c.   lithosphere  
  d.   stratosphere  
  20.The direction and speed of an object is described by its __________.  
  a.   velocity  
  b.   displacement  
  c.   average displacement  
  d.   average speed  

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