Law of Universal Gravitation

Slides:

Advertisements

Similar presentations

What is Circular Motion?

Advertisements

Universal Gravitation Everything Pulls on Everything Else!

Barry Latham Bloom High School Conceptual Physics, Hewitt, 1999.

Conceptual Physics – Chapter 12. Galileo  Inertia (Newton made it a law later)  Mass does not effect acceleration of gravity  Sun and not.

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.

Physics , Mar 7 Announcements Exam 2 graded –Average = 71.4 –Standard Deviation = 15.8 –High score = 96 –Median score = 72 Exam 2 corrections due.

Universal Gravitation

Newton’s Law of Gravity

Day 4.  Discussion on Yesterday’s Probes  Work on Today’s Probes.

Earth and Moon I 1) the Earth pulls harder on the Moon

Universal Gravitation

Gravity Chapter 7. Newton  Noticed the moon followed a curved path  Knew a force was required to allow an object to follow a curved path  Therefore,

Chapter 8 Universal Gravitation

Universal Gravitation

Newton’s Law of Universal Gravitation

Universal Gravitation Sir Isaac Newton: The Universal Law of Gravitation.

Newton’s Law of Gravitation. Newton concluded that gravity was a force that acts through even great distances Newton did calculations on the a r of the.

The Law of Universal Gravitation Isaac Newton’s Big Idea MoonApple Earth.

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.

Newton’s Law of Gravitation. Newton concluded that gravity was a force that acts through even great distances Newton did calculations on the a r of the.

Chapter 12 Universal Gravitation. What is gravity? We are all familiar with gravity. We see and feel the effects of gravity every day, but what is it?

Describe the gravitational force Define weight and relate to the gravitational force Distinguish between weight and mass Determine the weight of objects.

How we know what we know An introduction into orbital mechanics Matt Hamill.

Newton didn’t discover gravity; he discovered that gravity is universal. Everything pulls on everything else in a simple way that involves only mass and.

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.

Review Question What are Kepler’s laws?. Review Question What are Newton’s laws?

 The idea that gravity extends throughout the universe is credited to Sir Isaac Newton  The apple is falling toward Earth  Reason: pulled by Earth’s.

Law of Universal Gravitation Chapter 12 November 9/10.

Universal Gravitation

Universal Gravitation Gravity is the way in which masses communicate with each other.

Gravitation AP Physics 1. Newton’s Law of Gravitation What causes YOU to be pulled down? THE EARTH….or more specifically…the EARTH’S MASS. Anything that.

The Law of Universal Gravitation

Newton’s Universal Law of Gravitation

Unit 06 “ Circular Motion, Gravitation and Black Holes” Gravitation Problem Solving.

Proportionality between the velocity V and radius r

SPH3U – Unit 2 Gravitational Force Near the Earth.

Topic 6: Fields and Forces 6.1 Gravitational force and field.

Newton’s Universal Law of Gravitation Chapter 8. Gravity What is it? The force of attraction between any two masses in the universe. It decreases with.

The Apple & the Moon Isaac Newton realized that the motion of a falling apple and the motion of the Moon were both actually the same motion, caused by.

Newton’s Law of Universal Gravitation

Gravity: A Force of Attraction

Conceptual Physics Notes on Chapter 12 UniversalGravitation.

Notes: Forces Big “G” and little “g” Newton’s Law of Universal Gravity -F g, the force of attraction between two objects is directly proportional to the.

If it is known that A is directly proportional to B, how would A change if B is increased by a factor of 2? 1. Increase by a factor of 2 2. Increase by.

 Mass- the amount of atoms inside an object ◦ Mass does not change!  Weight- the pull of gravity on the mass of an object ◦ Weight changes depending.

PHYSICS 103: Lecture 11 Circular Motion (continued) Gravity and orbital motion Example Problems Agenda for Today:

Law of Gravitation. Law of Gravity  Gravitational Force  All objects have mass and therefore will attract all other objects.  The size of the gravitational.

Universal Gravitation Chapter 12. The Falling Apple The idea that gravity extends through the universe is attributed to Sir Issac Newton He knew that.

The Solar System The Moon The Earth The Sun How do they move? Why doesn’t the Earth fly away? Photos by NASA.

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.

Universal Gravitation Does the moon stay at a certain distance from the Earth or is it falling toward the Earth? - the moon is actually falling around.

Which is stronger, Earth’s pull on the Moon, or the Moon’s pull on Earth? 1) the Earth pulls harder on the Moon 2) the Moon pulls harder on the Earth 3)

Physics Section 7.2 Apply Newton’s Law of Universal Gravitation Gravitational force (gravity) is the mutual force of attraction between particles of matter.

Everything pulls on everything else.

Newton’s law of universal gravitation

GRAVITY – ITS NOT JUST A GOOD IDEA …. IT’S THE LAW!!!

Newton’s Law of Gravity

Universal Gravitation

Universal Gravitation

Newton’s Laws of Motion

Universal Law of Gravitation

Gravity and Motion Review

Gravity Chapter 3.2.

UNIT 3 gravitation.

Universal Gravitation

Newton’s Law of Universal Gravitation

Newton’s Law of Universal Gravitation

Presentation transcript:

Law of Universal Gravitation Chapter 12 November 9/10

Objectives Analyze how Earth is falling State Newton’s law of universal gravitation Evaluate the significance of inverse-square law

Introduction All objects have gravity Therefore, all objects attract one another

The Falling Apple An apple falls to Earth because of gravity Does Earth’s gravity pull the moon? YES Why doesn’t the moon fall into Earth? It does but it doesn’t crash because of tangential speed

The Falling Moon Earth’s gravity pulls moon = centripetal force Moon falls beneath the straight line it would follow if no force acted on it Below the tangential speed line Figure 9.2 Confirmed with experiment Figure 9.4

The Falling Earth Earth (and other planets) falls around the sun Why don’t planets crash into sun? Because of tangential velocities What would happen if tangential speeds went away? Crash into sun This has happened to asteroids and other matter without a big enough tangential speed

Check for understanding In the picture below use vectors and words to describe how the Earth orbits the sun Tangential speed Sun Earth Fc = gravity Earth stays in orbit as the resultant of the sun’s gravity and Earth’s tangential speed

Newton’s Law of Universal Gravitation Newton discovered gravity is universal Everything pulls on everything else Law of Universal Gravitation “Every object attracts every other object with a force that for any two objects is directly proportional to the mass of each object” Greater masses = greater force of attraction Greater distance (farther away) = less force of attraction

Newton’s Law of Universal Gravitation (con’t) Law can be expressed as an equation FG = force of gravity (N) G = universal constant = 6.7 x 10 -11 Nm2 kg2 m1 = mass of one object (kg) m2 = mass of other object (kg) r = radius (m)

Class work- Honors Use the equation that relates to the law of universal gravitation to solve the problem

Inverse Square Law When a quantity varies as the inverse square of its distance from its source Figure 9.4 and 9.5 Force of gravity depends on distance from Earth.

Closing An apple falls into Earth. Why doesn’t the moon fall and crash into Earth? It does but it doesn’t crash because of tangential speed AND Force of gravity is weaker since moon is farther from Earth’s surface than apple

Homework Next class we will: The following class is the unit exam on: Take a quiz on all units and symbols- STUDY! review for the unit exam The following class is the unit exam on: Newton’s 3 laws Centripetal force and tangential speed Law of universal gravitation