AIM: What is force? Define and give examples of “force”. Define and give examples of gravity.

AIM: What is force? Force, Gravity inversely proportional directly proportional

AIM: What is force? When you go to a foreign country, why is it important to know the language? To Communicate Why would it be important to know the language of science? To Communicate

AIM: What is force? FORCE: Forces in nature are very basic. They are defined as a push or a pull. Force is usually measured in Newtons AS AN EXAMPLE …

Both Students are pushing in the same direction

Both Students are NOT pushing in the same direction

What is gravity? Gravity is the force of attraction between all objects in the universe. “Newton’s Law of Gravity” Practically speaking: Gravity is the natural attraction of all objects to the center of the earth.

There are two basic rules for the force of gravity

RULE #1: All objects have gravity BUT larger objects have more gravity then smaller objects Which would have more gravity, the earth or the moon? Why? Because it is larger !

Rule #2: The closer objects are to each other, the more gravitational attraction they have towards each other. Conversely, the force of gravity between two objects decreases as the distance between them increases. Summary: Gravity is function of size (mass) and distance

Summary: Gravity is function of size (mass) and distance

LET’S REVIEW: The larger the size of an object the ______ the gravity. More Graph that!

Graph of Planets vs. Gravity

Let’s Review: If objects are closer, then their force of gravity is __________ Greater Conversely, if the distance between them increases, then the force of gravity between them _____. decreases Graph that!

Graph of Distance vs. Gravity

Class Activity: W/S Concepts 2-1; 2-1 AIM: What is Force?

Homework: INTERNET QUESTIONS FINISH W/S