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# 831 - PowerPoint PPT Presentation

Determine the relationship among the mass of objects, the distance between these objects, and the amount of gravitational attraction. 831. Determine the relationship among the mass of objects, the distance between these objects, and the amount of gravitational attraction. Key concepts/skills:

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Determine the relationship among the mass of objects, the distance between these objects, and the amount of gravitational attraction.

### 831

Determine the relationship among the mass of objects, the distance between these objects, and the amount of gravitational attraction

Key concepts/skills:

Level 1: Define key vocabulary.

Level 2: Understand how gravity changes as mass

changes. Understand how gravity changes

as distance changes.

Level 3: Know and understand the equation and

mathematical relationship between

gravity, mass, and weight.

Determine the relationship among the mass of objects, the distance between these objects, and the amount of gravitational attraction

Key vocabulary

Mass

Gravity

Distance

Grams

Meters

Newtons

Determine the relationship among the mass of objects, the distance between these objects, and the amount of gravitational attraction

I. History

A. Sir Isaac Newton

1. In the 1600’s, Newton realized that the force that kept things on the Earth existed throughout the universe

2. The Law of Universal Gravitation states that gravity is a force of attraction between all objects in the universe.

Determine the relationship among the mass of objects, the distance between these objects, and the amount of gravitational attraction

II. Gravity

A. Newton also discovered that gravity is not constant but changes.

B. Gravity changes as MASS and DISTANCE change

C. Mass is the amount of matter in an object and for most objects mass is constant

D. The larger the mass the more gravity it has. This is why you notice the Earth’s gravity but do not notice your gravity.

E. Objects must be very large before you notice their gravity affecting objects around them.

Determine the relationship among the mass of objects, the distance between these objects, and the amount of gravitational attraction

A. Distance between objects in the universe also determines how much gravity is between the objects.

B. As distance decreases gravity increases

C. As distance increases gravity decreases

Determine the relationship among the mass of objects, the distance between these objects, and the amount of gravitational attraction
Determine the relationship among the mass of objects, the distance between these objects, and the amount of gravitational attraction