Transcript P.FM.M.4 Speed

St. Clair County RESA
Monica Hartman
August 18, 2008
Group Norms
• Everyone participates, but you can always pass.
• No put downs.
• Be an active listener.
• Be honest and open when sharing ideas.
• Take risks.
• Find connections to each others’ thoughts.
• Be respectful of differences. Better yet,
appreciate and look forward to differences.
• Do not interrupt each other.
Fifth Grade GLCEs
P.FM.M.4 Speed- Motion can be described by a change in position
relative to a point of reference. The motion of an object can be
described by its speed and the direction it is moving. The position
and speed of an object can be measured and graphed as a function
of time.
P.FM.05.41 Explain the motion of an object relative to its point of
reference.
P.FM.05.42 Describe the motion of an object in terms of distance,
time and direction, as the object moves, and in relationship to
other objects.
P.FM.05.43 Illustrate how motion can be measured and represented on a
graph.
What moves?
How could you describe the
movement of one of these ideas
to a friend?
Ways to describe motion
 How far?
 Distance of motion
 How fast?
 Speed of motion
 Where?
 Direction of motion
Motion Sensor
Middle School Science with Vernier
 Graphing Your Motion
Experiment 33
Use a motion detector to make a graph of your motions.
Using the motion sensor
What does the line
look like when you
move away from the
reference point?
Distance vs. Time
distance
Reference point
time
Using the motion sensor
What does the line
look like when you
move toward the
reference point?
Distance vs. Time
distance
Reference point
time
Using the motion sensor
What will the line
look like if you stand
away from the motion
sensor and don’t
move?
Distance vs. Time
Time keeps ticking, even
if your distance from the
reference point (motion
sensor) stays the same.
distance
Reference point
time
Motion Sensor
Middle School Science with Vernier
 Velocity
Experiment 34
Use a motion detector to measure velocity
Speed
Galileo is credited with being the first to measure
speed by considering the distance covered and the
time it takes.
distance
Speed
=
time
A cyclist who covers 30 meters in a time of 2
seconds has a speed of 15 meters per second
Velocity
When we know the speed and the direction of an object,
we know its velocity.
distance
Velocity =
time
Constant Speed and Velocity
Constant Speed
Constant Velocity
 Constant speed means steady
 Constant velocity means both
speed.
 Something with constant speed
does not speed up or slow
down.
constant speed and constant
direction
 Constant direction is a straight
line – the object’s path does
not curve
 Constant velocity means
motion in a straight line at a
constant speed
Force Interactions
P.FM.M.2 Force Interactions- Some forces between
objects act when the objects are in direct contact
(touching), such as friction and air resistance, or when
they are not in direct contact (not touching), such as
magnetic force, electrical force, and gravitational force.
P.FM.05.21 Distinguish between contact forces and non-contact forces.
P.FM.05.22 Demonstrate contact and non-contact forces to change the
motion of an object.
Forces
P.FM.M.3 Force- Forces have a magnitude and direction. Forces can
be added. The net force on an object is the sum of all of the forces
acting on the object. The speed and/or direction of motion of an object
changes when a non-zero net force is applied to it. A balanced force on
an object does not change the motion of the object (the object either
remains at rest or continues to move at a constant speed in a straight
line).
P.FM.05.31 Describe what happens when two forces act on an object in
the same or opposing directions.
P.FM.05.32 Describe how constant motion is the result of balanced (zero net)
forces.
P.FM.05.33 Describe how changes in the motion of objects are caused by
a non-zero net (unbalanced) force.
P.FM.05.34 Relate the size of change in motion to the strength of
unbalanced forces and the mass of the object.
Physics for the Elementary
Teacher
 Simulators
What forces are involved in the motion of a
soccer ball before and after it is kicked?
Draw a picture of the soccer ball before it is
kicked and label the forces.
Draw a picture of the soccer ball after it is kicked
and label the forces.
Activity 1: Interactions and Force
 Is the motion of the cart after the push the same as during the
push?
 Follow the activities with the motion sensor as suggested on pages
2-2 to 2-6
 Do the Simulator Exploration as suggested on pages 2-7 and 2-8
 Cycle 2 Activity 1 Setup
 Read about Forces and Force Diagrams on pages 2-8 to 2-10
Activity 2: Motion with a
Continuous Force
 Do the activity as suggested on pages 2-13 to 2-18 using
the motion sensor, cars, and fans.
 Do the simulator activity on pages 2-18 to 2-19
Cycle 2 Activity 2 Setup
 Summarizing Questions pages 2-20 to 2-22.
Activity 2 HW
Pushing a Skateboarder
 Make predictions on pages 2-23 to 2-25
 Do Simulator Activity
Cycle 2 Activity 2 HW Setup
 Summarizing Questions on page 2-26
Activity 3
Pushing Against the Motion
 What effect does a backward push have on the motion of
an object?
 Make predictions as directed on pages 2-27 to 2-29.
Practice giving the car very gentle taps in the opposite
direction.
 Use the motion sensor
 Do the simulator exploration
Cycle 2 Activity 3 Setup
Activity 3
Pushing Against the Motion
 What effect does a continuous backward push have?
 Make predictions as directed on pages 2-32 to 2-34.
 Use the motion sensor for Experiment #2.
 Do the simulator exploration as described in Step 3 on
page 2-35 using the same setup as before
Cycle 2 Activity 3 Setup
 Summarizing Questions on pages 2-35 and 2-36
Activity 3 HW 1
Combinations of Forces
How do objects behave when more than one
force acts on them?
 Experiment #1 Simulator Exploration.
What effect do combinations of forces have on an object
at rest?
 Make a prediction - pages 2-41 and 2-42
 See page 2-50 for directions for using the simulator
 Activity 2 Activity 3 HW Setup 1 pages 2-42 to 2-45
Activity 3 HW:
Unbalanced Combination of Forces
 Experiment #2 Simulator Exploration
What effect does an unbalanced combination of forces
have on an object that is already moving? Pages 2-46 to
2-48
 Cycle 2 Activity 3 HW Setup 2
Activity 3 HW 2
Children’s Ideas about Force and
Motion
 Read pages 2-51 to 2-53
 Movie Activity 4
 What forces are involved in the motion of a soccer ball
before and after it is kicked?
Jet Toys
•http://www.sae.org/exdomains/awim/
A World In Motion