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Horizontal/Vertical Motion Short Answer Problems

Directions:  Answer all short answer problems using complete sentences and appropriate FORMULAS and UNITS.

1.      Compare and contrast the following:

    1. Speed and velocity –
    2. Velocity and acceleration –

 

  1. Two objects are dropped from different airplanes, with object “A” being dropped from an elevation that is 9 times higher than object “B”.  What is the relationship between the final velocity of the two objects developed.  Explain with the use of FORMULAS and a DIAGRAM.     Go to Solution.

 

  1. Two vehicles, “A” and “B”, moving with the same velocity are brought to rest.  Object “A” travels five times the distance of object “B”.  What is the relationship between the acceleration of “A” with respect to “B”?   Explain with the use of FORMULAS and a DIAGRAM.   Go to Solution.

 

  1. DIAGRAM and EXPLAIN the graphical representation of the following:
    1. 10 ft/sec
    2. 10 ft/sec2
    3. –5 ft/sec2

 

   5.  An ant walks along the x-axis of a graph, starting from the origin to the right 50 cm.  He stops, turns, and walks back along the axis to the origin.  Differentiate between the DISTANCE traveled by the ant and the DISPLACEMENT of the ant from the origin.

 

  1. A dime and a hammer are held over the edge of a building 64 feet tall, and are released at the same moment.  Using equation,  S = Vo t  +  ½ a t2, determine the relationship between the time of free fall for the dime and the hammer.

 

  1. Two cars are traveling through the business district of a town where the speed limit is 25 mi/hr.  Car “A” is traveling at the speed limit while car “B” is traveling at 40 mi/hr.  Both cars will experience the same acceleration while coming to rest.  What is the relationship between the stopping distances of these cars. Go to Solution.

 

  1. A lead ball is fired from a gun vertically upward with a velocity of “VO” and reaches a height of “H”.  From what height must this same ball be fired, but directed downward, such that it strikes with a velocity of 3VO?  MUST BE SUPPORTED MATHEMATICALLY.

 

  1. If the velocity of an object is NOT zero, can the acceleration ever be zero?  Explain.

 

  1. Explain the condition(s) that must exist if an object is to have constant velocity.

 

  1. If the average velocity of an object is zero in some time interval, what are you able to say about the displacement of the object for that time interval?  BE SPECIFIC.

 

  1. If two cars start from rest, car “A” has one-half the displacement of car “B”.  Both have the same acceleration.  What relationship exists between their final velocities?  MUST BE SUPPORTED ALGEBRAICALLY. Go to Solution.