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Investigating Center of Gravity—Super Value Laboratory Kit

By: The Flinn Staff

Item #: AP7067 

Price: FREE

Temporarily out of stock; call for availability.

In the Investigating Center of Gravity Laboratory Kit for physical science and physics, locate the center of gravity for objects of various shapes-five different polygons.

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Product Details

Challenge students to locate the center of gravity for objects of various shapes. Students place the corner of one polygon on a hook so that the object hangs freely. Then, they hang a weight tied to string from the same corner. Using a dry-erase marker, students trace a line on the polygon that is defined by the hanging string. Students repeat the process from two different corners of the polygon. The three traced lines will all intersect at the same point-the center of gravity! Students locate the center of gravity for five different polygons. Includes two sets of five polygons, string, weights, S-hooks, dry-erase markers, detailed instructions and Teacher's Notes. Super Value Kit is complete for 10 student groups. All materials are reusable! Support stands and clamps are required and available separately.


Materials Included in Kit: 
Black dry erase marker, wedge tip, 10
Polygon, inverse pentagon with holes, 2
Polygon, irregular pentagon, with holes, 2
Polygon, irregular trapezoid with holes, 2
Polygon, isosceles triangle with holes, 2
Polygon, parrellogram with holes, 2
S-hook, zinc plated steel, open end, 20
String, thin, ball of ⅙ lb, 331 m
Washer, ¾" o.d., 10

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Obtaining, evaluation, and communicating information
Developing and using models
Asking questions and defining problems

Disciplinary Core Ideas

MS-PS2.A: Forces and Motion
MS-PS2.B: Types of Interactions
HS-PS2.A: Forces and Motion
HS-PS2.B: Types of Interactions

Crosscutting Concepts

Energy and matter
Systems and system models
Cause and effect
Structure and function

Performance Expectations

MS-PS2-4: Construct and present arguments using evidence to support the claim that gravitational interactions are attractive and depend on the masses of interacting objects
HS-PS2-5: Plan and conduct an investigation to provide evidence that an electric current can produce a magnetic field and that a changing magnetic field can produce an electric current.