TABLE OF CONTENTS - Lindbergh School District

Strand 2: Properties and Principles of Force and Motion
2. Forces affect motion
Major Objectives IS Suggested Activities Suggested Assessments
Concept A: Forces are classified as either
contact forces (pushes, pulls, friction,
buoyancy) or non-contact forces (gravity,
magnetism) that can be described in terms
of direction and magnitude
a. Identify the forces acting on the motion
of objects traveling in a straight line.
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a. Students will use a magnet to affect the
straight line movement of the steel marble
(curved line). Students will also drop the
marble onto a soft surface to represent
gravity’s force. (1.2)
a. Students will identify how the movement was
affected by the magnet and the drop.
b. Recognize friction as a force that slows
down or stops a moving object that is
touching another object or surface.
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b. Students will take turns rolling metal toy
cars across smooth, carpeted, and sandpaper
surfaces. Students will the roll car from the
same starting point and measure the distance
it travels over the different surfaces. (1.8;
4.8)
b. Students will consider possible future road
surfaces that would make roads safer.
Students will create data table or
measurements from activity.
c. Compare the forces (measured by a
spring scale in Newtons) required to
overcome friction when an object moves
over different surfaces (i.e.,
rough/smooth).
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c. Students will drag balls across smooth,
carpeted, and sandpaper surfaces with spring
scale. Students will record scale
measurement for each ball and surface. (1.8)
c. Students will create data table and graph to
compare differences between the balls and
surfaces.
Concept B: Every object exerts a
gravitational force on every other object
a. Determine the gravitational pull of the
Earth on an object (weight) using a
spring scale.
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a. Students will weigh different balls using
spring scale. Relations between the ball’s
composition, size, and material construction
are recorded. (1.8)
a. Students will use a comparison graphic
organizer to show the differences between
balls.
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