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Motion and Speed

Practice Test
  1.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  
  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.   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  
  3.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  
  4.The distance between the final position and the starting position is the __________.  
  a.   differential  
  b.   velocity  
  c.   acceleration  
  d.   displacement  
  5.The direction and speed of an object is described by its __________.  
  a.   average displacement  
  b.   average speed  
  c.   displacement  
  d.   velocity  
  6.The distance between an object and a reference point is the object's __________.  
  a.   displacement  
  b.   velocity  
  c.   position  
  d.   neutral point  
  7.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   motion  
  b.   force  
  c.   acceleration  
  d.   velocity  
  8.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   magnetosphere  
  b.   stratosphere  
  c.   lithosphere  
  d.   core  
  9.Any change over time is called a(n) __________.  
  a.   velocity  
  b.   acceleration  
  c.   speed  
  d.   rate  
  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.   10.5 km  
  b.   10 km  
  c.   2.8 km/h  
  d.   11 km  
  11.Forces that cancel each other are called __________ forces.  
  a.   inactivated  
  b.   neutral  
  c.   balanced  
  d.   null  
  12.__________ is the speed of an object at any instant of time.  
  a.   Average speed  
  b.   Velocity  
  c.   Instantaneous speed  
  d.   Acceleration  
  13.Which of the following is not an acceleration?  
  a.   riding your bike faster when you ride down a hill  
  b.   riding your bike straight down the street at a constant speed  
  c.   stopping your bike at an intersection  
  d.   slowing your bike ride so you can make it up a hill  
  14.__________ measures an object's tendency to resist changing its motion.  
  a.   Mass  
  b.   Inertia  
  c.   Acceleration  
  d.   Gravity  
  15.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.   3.7 km south  
  c.   7.1 km south  
  d.   7.1 km north  
  16.__________ is the distance an object travels per unit of time.  
  a.   Speed  
  b.   Acceleration  
  c.   Velocity  
  d.   Displacement  
  17.Motion occurs when an object changes its __________.  
  a.   position  
  b.   mass  
  c.   force  
  d.   volume  
  18.The __________ is the combination of all the forces acting on an object.  
  a.   net force  
  b.   force pair  
  c.   inertia  
  d.   direction of motion  
  19.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  
  20.The SI unit of distance is the __________.  
  a.   liter  
  b.   mile  
  c.   gram  
  d.   meter  

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