WEIGHT The weight of a body is the Weight (a quantity) is different from mass (a quantity). The weight of a body varies with its location near the Earth.

Slides:

Advertisements

Similar presentations

FORCE A force is any influence that can change the velocity of a body. Forces can act either through the physical contact of two objects (contact forces:

Advertisements

1 Motion – Newton’s Laws Gravity – A Closer Look The Universal law of Gravity.

Chapter 4 Forces in One Dimension

Newton’s 3 rd Law and Law of Gravitation Honors Physics.

Copyright © 2009 Pearson Education, Inc. Lecture 7 Gravitation 1.

Chapter 4 The Laws of Motion. Forces Usually think of a force as a push or pull Usually think of a force as a push or pull Vector quantity Vector quantity.

Phy 101: Fundamentals of Physics I Chapter 9 Lecture Notes.

Projectile Motion A projectile is an object on which the only force acting is ______ and the direction of this force is always _____. (In real life, a.

Newton’s Laws - continued

Newton’s Law of Universal 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.

Universal Gravitation

Gravitation and Newton’s Synthesis

Newton's law of universal gravitation states that every point mass in the universe attracts every other point mass with a force that is directly proportional.

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.

Newton’s Third Law of Motion Level 1 Physics. N.T.L Whenever one body exerts a force on a second body, the second body exerts an oppositely directed force.

1.  Legend has it that Sir Isaac Newton was struck on the head by a falling apple while napping under a tree. This prompted Newton to imagine that all.

SECOND LAW OF MOTION If there is a net force acting on an object, the object will have an acceleration and the object’s velocity will change. Newton's.

Newton’s Laws - continued Friction, Inclined Planes, N3L, Law of Gravitation.

 Isaac Newton  Smart Guy  Liked Apples  Invented Calculus  Came up with 3 laws of motion  Named stuff after himself.

Universal Gravitation - Isaac Newton Combine Kepler’s Laws with Newton’s three laws of motion to get: “Between any two objects there exist an attractive.

Chapter 6 Gravitation and Newton’s Synthesis HW5: Chapt 6: Pb. 11, Pb. 24, Pb. 25 and Chapt. 7: Pb 6, Pb.11, Pb. 16, Pb.19, Pb. 21 –Due Friday, Oct. 9.

1 The Law of Universal Gravitation. 2 A little background … Legend has it that Sir Isaac Newton was struck on the head by a falling apple while napping.

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

Newton’s Law of Universal Gravitation. What do we know about gravity?

Newton’s 3 rd Law and Law of Gravitation Physics.

Circular Motion.

Bellwork Why do objects of different mass accelerate at the same rate at the surface of the earth? The more massive object has a greater force of gravity.

Universal Law of Gravitation

6.1 Gravitational Force and Field

PHY115 – Sault College – Bazlurslide 1 Gravitational Force.

GRAVITATION NEWTON’S LAW OF GRAVITATION There is an attractive force between any two bodies which is directly proportional to the product of their masses.

C H A P T E R 4 Forces and Newton's Laws of Motion

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.

Phys211C12 p1 Gravitation Newton’s Law of Universal Gravitation: Every particle attracts every other particle Force is proportional to each mass Force.

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

Newton’s Law of Universal Gravitation

Newton’s Universal Law of Gravity Every object attracts every other object with a force that is directly proportional to the masses of the objects and.

FgFg agag mg g W Do you know the difference?? Newton’s Law of Universal Gravitation Every body in the universe attracts every other body with a force.

PHY 151: Lecture Mass 5.4 Newton’s Second Law 5.5 Gravitational Force and Weight 5.6 Newton’s Third Law.

Apparent Weight. Apparent Weight of an object is the reading on a ___________ scale when that object is placed on it.

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

NEWTON’S LAW OF UNIVERSAL GRAVITATION Newton’s Law of Universal Gravitation.

Newton’s Law of Universal Gravitation

Newton’s law of Universal Gravitation

2-2-2 Universal Gravitation

Newton’s Law of Gravity

Introduction to Gravity and Orbits

3.1 Force of Gravity.

Newton’s Laws of Motion

Universal Law of Gravity

Law of Universal Gravitation

Isaac Newton ( ) Newton’s Laws of Motion

Universal Gravitation

Universal Gravitation

Universal Law of Gravity

Universal Gravitation

Newton’s Law of Gravitation

Unit 3A: Gravitational Forces and Fields

NEWTON’S THREE LAWS.

QQ 4 Egyptian slaves moved a huge brick at a constant speed of .5 km/hr. Two of them pulled with a force of 120 N and two pulled with a force of 160 N.

Topic 6: Fields and Forces

Newton’s Law of Universal Gravitation

Newton’s Law of Universal Gravitation

Dynamics: Newton’s Laws of Motion

Universal Gravitation

Newton’s Law of Universal Gravitation

Presentation transcript:

WEIGHT The weight of a body is the Weight (a quantity) is different from mass (a quantity). The weight of a body varies with its location near the Earth (or other astronomical body), whereas its mass is the same everywhere in the universe. The weight of a body is the force

THE NORMAL FORCE A normal force is a force Note: The gravitational force and the normal force are not an action-reaction pair.

FREE BODY DIAGRAMS In all but the simplest problems that involve forces, it is helpful to draw a free body diagram (FBD) of the situation. This is a vector diagram that shows all the forces that act on the body whose motion is being studied. Forces that the body exerts on anything else should not be included, since such forces do not affect the body's motion.

FTFT FNFN FfFf FgFg FaFa FsFs Complete the free body diagram showing all of the forces acting on the mass M. Be sure to show the direction of each force as an arrow and label each force clearly! Example Forces:

Example:

The secret to these problems is to treat each body as a separate object.

Newton’s Law of Universal Gravitation

NEWTON’S LAW OF UNIVERSAL GRAVITATION Any two objects in the Universe exert an attractive force on each other -called the gravitational force- whose strength is proportional to the product of the objects’ masses and inversely proportional to the square of the distance between them. If we let G be the universal gravitational constant, then the strength of the gravitational force is given by the equation: Units: Newtons (N)

The equation for Universal Gravitation is an inverse square law

Henry Cavendish determined the first reasonably accurate numerical value for G more than one hundred years after Newton’s Laws were published. To three decimal places, the currently accepted value is:

Example What is the force of gravity acting on a 2000 kg spacecraft when it orbits two Earth radii from the center of Earth?

Example a. Derive the expression for g from the Law of Universal Gravitation.

b. Estimate the value of g on top of Mt. Everest (8848 m) above the Earth’s surface.