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Motion and Speed

Practice Test
  1.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  
  2.__________ is the change in velocity divided by the time needed for the change to occur.  
  a.   Average velocity  
  b.   Acceleration  
  c.   Speed  
  d.   Displacement  
  3.Changes in which of the following of Earth's layers cause earthquakes?  
  a.   core  
  b.   stratosphere  
  c.   magnetosphere  
  d.   lithosphere  
  4.__________ is the distance an object travels per unit of time.  
  a.   Velocity  
  b.   Acceleration  
  c.   Displacement  
  d.   Speed  
  5.Motion occurs when an object changes its __________.  
  a.   volume  
  b.   mass  
  c.   position  
  d.   force  
  6.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  
  7.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.   4 km/h  
  b.   8 km/h  
  c.   2 km/h  
  d.   2.67 km/h  
  8.Which of the following devices is used to indicate instantaneous speed?  
  a.   compass  
  b.   stopwatch  
  c.   speedometer  
  d.   odometer  
  9.The SI unit of distance is the __________.  
  a.   liter  
  b.   meter  
  c.   gram  
  d.   mile  
  10.Average speed is found by __________.  
  a.   dividing the displacement by the total time spent  
  b.   multiplying 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  
  11.Forces that cancel each other are called __________ forces.  
  a.   null  
  b.   inactivated  
  c.   neutral  
  d.   balanced  
  12.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.   3.7 km  
  c.   7.1 km south  
  d.   7.1 km north  
  13.Any change over time is called a(n) __________.  
  a.   velocity  
  b.   speed  
  c.   acceleration  
  d.   rate  
  14.__________ is the speed of an object at any instant of time.  
  a.   Acceleration  
  b.   Instantaneous speed  
  c.   Average speed  
  d.   Velocity  
  15.__________ measures an object's tendency to resist changing its motion.  
  a.   Gravity  
  b.   Inertia  
  c.   Acceleration  
  d.   Mass  
  16.The direction and speed of an object is described by its __________.  
  a.   average displacement  
  b.   velocity  
  c.   average speed  
  d.   displacement  
  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.   2.8 km/h  
  b.   10 km  
  c.   11 km  
  d.   10.5 km  
  18.The __________ is the combination of all the forces acting on an object.  
  a.   force pair  
  b.   inertia  
  c.   net force  
  d.   direction of motion  
  19.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  
  20.A(n) __________ is a push or a pull that one body exerts on another.  
  a.   velocity  
  b.   force  
  c.   motion  
  d.   acceleration  

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