What is Center of Gravity? - Definition, Equation & Examples


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question 1 of 3

A 100 lb see-saw has a center of gravity above the fulcrum, the triangular piece in the center. Joe (Mass 1) weighs 90 lbs and sits 80 inches to the left of the fulcrum. Cindy (Mass 2), who weighs 75 lbs, sits on the right. How far from the fulcrum does Cindy need to sit so that Mass 1 and Mass 2 are balanced with respect to the fulcrum?

Hint: treat distance to the left of the fulcrum as negative

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Mark (Mass 1) who weighs 140 pounds sits on a seesaw weighing 110 pounds at a distance of 60 inches from the fulcrum (the center of gravity of the seesaw). Lucy (Mass 2) sits at a distance of 80 inches to the right of the fulcrum in order to keep the seesaw in balance. How much does Lucy weigh?

Hint: treat distance to the left of the fulcrum as negative

2. Select the correct definition for center of gravity

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About This Quiz & Worksheet

An object's center of gravity is the point on the object in which weight is evenly distributed on all sides. This quiz/worksheet combo will help you test your understanding of this concept. The quiz will ask you to solve some practice problems and understand the concept of gravity.

Quiz & Worksheet Goals

In these assessments you'll be tested on:

  • Solve problems using the center of gravity equation
  • Define center of gravity
  • Know how the center of gravity changes based on height

Skills Practiced

  • Information recall - access the knowledge you've gained regarding centers of gravity culture
  • Knowledge application - use your knowledge to answer questions about how to determine the center of gravity
  • Interpreting information - verify that you can read information about how the center of gravity can change for a specific object and interpret it correctly

Additional Learning

To learn more about centers of gravity, review the accompanying lesson called What is Center of Gravity? - Definition, Equation & Examples. This lesson covers the following topics:

  • Participate in an experiment to better understand the center of gravity concept
  • Understand how the center of gravity can change based on height
  • Identify the most stable objects