What is Motion???
Motion—the movement
of an object in relation to
something considered
stationary(a frame of
reference)!!!
Frame of Reference
Motion Terms:
• Distance vs. Displacement
– Distance—How far you move.
– Displacement—How far you are from where you
started!!
50 m
A Student walks from A to B to C to D
and back to A. What distance did the
student travel?
A. 0 meters
B. 6 meters
C. 10 meters
D. 12 meters
A Student walks from A to B to C to D
and back to A. What is the student’s
displacement?
A. 0 meters
B. 6 meters
C. 10 meters
D. 12 meters
Distance Vs. Displacement
Other Motion Terms:
• Speed vs. Velocity
– Speed—How fast you move!!
– Velocity—Speed in a particular direction!!
Instantaneous vs. Average Speed
Instantaneous Speed
• The speed at any instant in
time.
Average Speed
• Total distance divided by
total time.
The Velocity Equation:
• Where:
d is distance(displacement)----given in m or km
t is time----given in s or hr
v is velocity-----given in m/s or km/hr
Same equation used for speed!!!
Solving Word Problems:
1. Write down what you are given(the
important stuff like #’s, etc.).
2. Write down what you are looking for!
3. Find an equation that fits what you have.
4. Solve the equation for what you are looking
for!
5. Plug and Chug!!
Using the Velocity Equation:
Ex.) A person walks 50 m in 12 s. At what
velocity did the person travel?
Given:
d = 50 m
t = 12 s
v=?
Ex.) A car is moving down the road at 25 m/s.
How far will it travel in 18 s?
Given:
v = 25 m/s
t = 18 s
d=?
Ex.) A whale is swimming across the ocean at
14 m/s. How long will it take the whale to
swim 1000 m?
Given:
v = 14 m/s
d = 1000 m
t=?
A car moves a distance of 2400 m in
55 s. How fast is the car moving?
A. 32 m/s
B. 44 m/s
C. 60 m/s
D. 72 m/s
A little girl walks 75 m to his grandmother’s
house at 3 m/s. How long will it take her to
walk that distance?
A. 225 s
B. 78 s
C. 35 s
D. 25 s
Distance Vs. Time Graphs
What can be determined
by the slope of a distance
time graph?
Yo Adrian, You
When does the
know, You know
slope of a distance
it’s
Always
!!!
time graph =
velocity?
Straight Line,
therefore constant
Velocity!!
Line not straight,
therefore velocity not
constant. If velocity is
not constant, object must
be accelerating!!
In which of the following graphs is the runner
running the fastest?
Which of the following graphs indicates that one of
runners started 10 yards ahead of the other?
In which of the following graphs are both runners
moving at the same speed?
Which sentence best
describes the runner
whose distance-time
graph is shown?
A. The runner ran forward for 2 seconds, and then he ran backward for 2
more seconds.
B. The runner ran forward for 2 seconds, and then he stood still for 2 more
seconds.
C. The runner ran forward for 2 seconds, and then he ran forward at a
slower pace for 2 more seconds.
D. The runner ran forward for 2 seconds, and then he turned right and
continued forward at the same speed for 2 more seconds.