What is Motion?
Position
Where the object is located
Changing Position
If something is in motion, it is changing positions
Reference Point
An object used to determine if
something is in motion
Distance and Displacement
Distance- the length of the route
Displacement- distance between the
starting and ending points & direction
Speed
Average Speed- Found by dividing
the total distance traveled by the
time taken
Instantaneous Speed- the
speed of an object at one
instant
Speed
Formula :
s=d/t
Velocity
The speed of the object and the direction of its motion
Units
Distance
Time
Speed: distance/time
-m
-hrs
-m/s
-mi
-mins
-mi/hr (mph)
-in
-secs
-km/day
-ft
-days
-mi/s
-km
Let’s
Practice
The only difference between speed & velocity is that
speed includes direction.
Agree
Disagree
The formula for speed is…. s=d/t
True
False
Which would be an example of a good reference point?
A car traveling faster
than another car
A player running past a
bench on the soccer field
A runner passing a
walker while running a
race
Draw a line, matching up the units under the correct section
Distance
Time
Speed
m
in
sec
hrs
days
m/day
mi/hr
months
km
mi
km/s
min
m/min
year
Practice
1. Jane sets a world record by
swimming 400m in 20.14s. What is
her average speed?
d=
t=
s=
Practice
2. In a bicycle race John covered
735km in 12.9h. What is his average
speed?
d=
t=
s=
Practice
3. Jamie is going to see her family in
New York over spring break. If her
Mother drives an average of 55 mph for
25 hours, how far will they travel?
d=
t=
s=
Practice
4. If sound moves at 360m/s, then if
you were 9742m away- How long does
it take before you hear the sound?
d=
t=
s=
Practice
5. Your sister says she can run faster than
you. She can run 2.0m/s. To see who is
faster you race 300m. Your time is 79s.
Who is faster?
d=
t=
s=
Practice
6. Your neighbor says she is faster than you. She
can run at a speed of 1.75m/s. So you time you
& her running 200m. You run at a time of
3.8mins. Who is faster? (Remember to change
minutes to seconds!!)
d=
t=
s=