# Velocity

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

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

latitude
depth
liquid
direction

#### 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

#### The defining equation for velocity is

1. v = d / t
2. v = d * t
3. v = t / d
4. v = (t * d)2
a
b
c
d

a distance
a goal
a target
a vector

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

v = d / t

They are important
Just a style
They are vectors
None of the above

#### 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

straight
curved
circular
double

#### Mark the vector quantities

v = d / t

v is (1) __________

d is (2) __________

t is (3) ___________

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Vector
Not Vector
Not Applicable

measurements
scalars
numeric
counters

#### Identify each of the following quantities as vectors or scalar

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

vector
scalar

#### 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