Velocity

👁 97
statistics
by Dr. Osama M. Khaled last modified 2022-07-19T04:22:34+00:00

Velocity tells us more about things that we need to know about motion

Questions #: 11
Time: 5 minutes
Pass Score: 80.0%
Style
Mode

Velocity is how fast something is moving in a specific ________

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Explanation

Identify the following two descriptions below as speed or velocity

  1. 20 meters/second 
  2. 20 meters/second northeast
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velocity
speed
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Explanation

The defining equation for velocity is

  1. v = d / t
  2. v = d * t
  3. v = t / d
  4. v = (t * d)2
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Explanation

A quantity that has direction as well as magnitude (size) is called

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Explanation

Why quantities in velocity equation are in bold face although it is defined same way as speed equation

v = d / t

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Explanation

Symbol d in velocity equation

is called object's displacement and defined as the _______-line distance from object's starting position to its final position, including the direction from start to finish

v = dt

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Explanation

Mark the vector quantities

v = d / t

v is

d is

t is

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Vector
Not Vector
Not Applicable
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Explanation

All quantities that are not vector are called _______

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Identify each of the following quantities as vector or scalar

  1. velocity
  2. speed
  3. time
  4. displacement
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vector
scalar
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Explanation

Is acceleration a vector or a scalar?

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Jogger Example

Suppose a jogger leaves her house and jogs north 300 meters to the streetlamp on the corner.  She turns west, jogs another 300 meters, and gets the oak tree 2 minutes after leaving home

  1. Which of the three distances given in the figure is the displacement d?
  2. What is the jogger's average velocity? 
  3. What is the total distance (not displacement) travelled? 
  4. What is the average speed (not velocity) during the 2 minutes? 

 

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350 meters/min
500 meters
700 meters
250 meters/min in a direction between north and west
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Explanation

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