Essential Question: How do mass and distance affect the gravitational pull of an object? Standard: S8P5a. Recognize that every object exerts gravitational.

Slides:



Advertisements
Similar presentations
Gravity and Inertia.
Advertisements

Gravity: A Force of Attraction
Earth and Gravity.
walking across a surface.
Gravity.
Gravity. We know that planets travel around the Sun. Earth travels around the sun every 365 ¼ days. But what keeps the planets in this constant motion.
Gravity and Motion.
Gravity Newton’s Laws of Motion
Newton and Gravity. State of Physics By now the world knew: Bodies of different weights fall at the same speed Bodies in motion did not necessarily come.
Chapter 4 Lesson 21 TCAP Coach
Do Now Significantly decreased gravity gives astronauts the sensation of being weightless and forces astronauts to make many adjustments in their activities.
Force and Gravity.
What is net force?.
Activating Strategy: You are a professional athlete in any sport of your choice(s). You will be competing on a neighboring planet that has a smaller gravitational.
Gravity Section 1-2.
Don’t let it get you down!
KEY CONCEPTS WHAT DETERMINES THE STRENGTH OF THE FORCE OF GRAVITY BETWEEN TWO OBJECTS? WHAT TWO FACTORS COMBINE TO KEEP THE MOON AND EARTH IN ORBIT? Gravity.
Gravity. Gravity A force of attraction between objects that is due to their masses. A force of attraction between objects that is due to their masses.
Gravity and Motion Chapter 19 section 2. Isaac Newton realized that there must be a force acting between Earth and the moon that kept the moon in orbit.
Chapter 1; Section 1. Observing Motion Reference Point: Object that appears to stay in place Ex: Earth’s surface You Landscape Motion: When an object.
Unit 5 Lesson 5 Gravity and Motion
Page 41 of ISN I can describe how gravity and air resistance affect the motion of a falling object.
The Nature of Force.
< BackNext >PreviewMain Chapter 13 Forces and Motion Preview Section 1 Gravity: A Force of AttractionGravity: A Force of Attraction Section 2 Gravity and.
Essential Question: How do mass and distance affect the gravitational pull of an object? Standard: S8P5a. Recognize that every object exerts gravitational.
Newton’s Law of Universal Gravitation
Gravity: A Force of Attraction
Today is all about GRAVITY!!!
Gravity: A Force of Attraction Chapter 19 Matter in Motion Section 4.
Gravity Newton realized that a force acts to pull objects straight down toward the center of Earth. He called this force gravity. Gravity is the force.
Gravity 1.Gravity requires air/atmosphere. 2.The strength of a gravitational force depends on the mass of objects. 3.ALL objects in the Universe attract.
Gravity and Motion. Isaac Newton Isaac Newton was the first person to hypothesize that the force that pulls an apple to the ground also pulls the moon.
Friction and Gravity (Text pages 340 to 348) Key Concepts:
Matter In Motion Gravity: A Force of Attraction. Terms Gravity~ a force of attraction between objects that is due to their masses Weight~ a measure of.
Gravity is a force that pulls objects toward each other. Legend says that Isaac Newton discovered gravity when he saw an apple fall from a tree Sir Isaac.
GRAVITY. INTRODUCTION Friction explains why a book comes to a stop when it is pushed. But why does a book fall to the ground if you lift it and let it.
Activating Strategy A chair will be placed in the middle of the floor. Teacher question: Are there any forces acting on this chair? Invite a student to.
Gravity and Motion.
Gravity and Motion.
Miss Sauer’s 7th Grade Science
Agenda FF EQ Notes on Friction & Gravity I Bet You Can’t Activity
Gravity.
Gravity.
Chapter 13 Motion and Forces.
The Nature of Force.
Gravity: A Force of Attraction
Gravity and Motion Ms. Mudd 6th Astronomy.
GRAVITY.
What is gravity? Do you think gravity is the same everywhere? Explain.
Mass, Weight and Gravity
Unit 7 Lesson 2. Gravity: A Force of Attraction A
Gravity and Motion Review
Agenda FF EQ Notes on Friction & Gravity I Bet You Can’t Activity
Activating Strategy: You are a professional athlete in any sport of your choice(s). You will be competing on a neighboring planet that has a smaller gravitational.
Gravity What is Gravity?.
Chapter 13 Preview Section 1 Gravity: A Force of Attraction
How Distance and Mass Affect Gravity
Forces.
Let’s do some cutting!!! GLUE
Chapter One, Section Two:
Essential Question: How do mass and distance affect the gravitational pull of an object? Standard: S8P5a. Recognize that every object exerts gravitational.
Essential Question: How do mass and distance affect the gravitational pull of an object? Standard: S8P5a. Recognize that every object exerts gravitational.
Gravity and Freefall.
Activating Strategy: You are a professional athlete in any sport of your choice(s). You will be competing on a neighboring planet that has a smaller gravitational.
The Effects of Gravity on Matter
FORCES Lesson 1 Gravity.
Gravity and Freefall.
Activating Strategy: You are a professional athlete in any sport of your choice(s). You will be competing on a neighboring planet that has a smaller gravitational.
Force A Push or a Pull.
Presentation transcript:

Essential Question: How do mass and distance affect the gravitational pull of an object? Standard: S8P5a. Recognize that every object exerts gravitational force on every other object and that the force exerted depends on how much mass the objects have and how far apart they are.

What you have learned so far…

Gravity Gravity is a force of attraction between objects that is due to their masses. All objects experience an attraction toward all other objects. This gravitational force pulls objects toward each other. The attraction between objects will be discussed in more depth in the next essential question. For this essential question, we just need students to understand that all objects have the force of gravity pulling them toward the earth which keeps things in place unless an unbalanced force occurs.

Gravity Compared with all other objects around you, Earth has a huge mass. Therefore, Earth’s gravitational force is very large. You must apply forces to overcome Earth’s gravitational force any time you lift objects or even parts of your body.

Gravity Earth’s gravitational force pulls everything toward the center of Earth. Because of this force, the books, tables, and chairs in the room stay in place, and dropped objects fall to Earth rather than moving together toward you.

Unbalanced Forces Air resistance is pushing upwards Gravity is pulling to the ground

What happens if you drop an elephant and a feather at the same time What happens if you drop an elephant and a feather at the same time? Which will hit the ground first? Why? The force of air resistance is greater on the elephant because of its size and shape.

What if gravity was the only force acting on the elephant and the feather? They would both fall at the same speed due to the earth’s gravity. This is known as freefall.

Remember, all objects exert a force on other objects.

The Law of Universal Gravitation All objects in the universe attract each other through gravitational force. The size of the force depends on the masses of the objects and the distance between the objects.

Gravitational Force Increases as Mass Increases Imagine an elephant and a cat. Which has a larger mass? The amount of gravity between an elephant and Earth is greater than the amount of gravity between a cat and Earth. So, a cat is much easier to pick up than an elephant.

Gravitational Force Increases as Mass Increases There is also gravity between the cat and the elephant, but that force is very small because the cat’s mass and the elephant’s mass are so much smaller than Earth’s mass.

Watch the video clip below Watch the video clip below. Turn to an elbow partner and discuss how the video illustrates the law of universal gravitation. https://www.youtube.com/watch?v=3Cm83yYtDns The moon has less mass than Earth does. Therefore, the moon’s gravitational force is less than Earth’s. The astronauts are not being pulled down with as much force as they would have been on Earth.

Gravitational force is small between objects that have small masses. The gravitational force between objects increases as the masses of the objects increase. Arrows indicate the gravitational force between two objects. Gravitational force is small between objects that have small masses. Gravitational force is large when the mass of one or both objects is large.

The reason is that the sun is so far away. The gravitational force between you and the Earth is large. Whenever you jump, you are pulled back down by Earth’s gravitational force. The reason is that the sun is so far away. On the other hand, the sun is more than 300,000 times more massive than Earth. So why doesn’t the sun’s gravitational force affect you more than Earth’s does?

The gravity between the sun and the planets is large because the objects have large masses. If the sun’s gravitational force did not have such an effect on the planets, the planets would not stay in orbit around the sun.

The gravitational force between objects decreases as the distance between the objects increases. Gravitational force is strong when the distance between two objects is small. If the distance between two objects increases, the gravitational force pulling them together decreases rapidly.

StudyJams: Gravity & Inertia