Astronomy 102, Spring 2003 Solutions to Review Problems
... 2. Consider a binary system consisting of a main sequence star and a white dwarf companion. Which star is older? Which star started its life with more mass? Given that we’ve talked about how far apart stars are in the galaxy, they almost never run into each other. (It’s a different matter in the cor ...
... 2. Consider a binary system consisting of a main sequence star and a white dwarf companion. Which star is older? Which star started its life with more mass? Given that we’ve talked about how far apart stars are in the galaxy, they almost never run into each other. (It’s a different matter in the cor ...
Newton`s laws of motion
... Action and Reaction What is Newton’s law of actionreaction? • Newton’s third law of motion states whenever one object applies a force on a second object, the second object applies an equal and opposite force on the first object. • The force exerted by the first object is called the action force • Th ...
... Action and Reaction What is Newton’s law of actionreaction? • Newton’s third law of motion states whenever one object applies a force on a second object, the second object applies an equal and opposite force on the first object. • The force exerted by the first object is called the action force • Th ...
Chapter 3 lecture notes
... 2. Your empty hand is not hurt when it bangs lightly against a wall. Why is it hurt if it does so while carrying a heavy load? Which of Newton's laws is most applicable here? 3. When a junked car is crushed into a compact cube, does its mass change? Its weight? Its volume? Explain. 4. If it takes 1 ...
... 2. Your empty hand is not hurt when it bangs lightly against a wall. Why is it hurt if it does so while carrying a heavy load? Which of Newton's laws is most applicable here? 3. When a junked car is crushed into a compact cube, does its mass change? Its weight? Its volume? Explain. 4. If it takes 1 ...
Chapter 13 Lecture
... Also derive a general expression for the gravitational potential energy of a system Look at the energy of planetary and satellite motion. ...
... Also derive a general expression for the gravitational potential energy of a system Look at the energy of planetary and satellite motion. ...
Newton`s Laws of Motion
... The size of the force on the air equals the size of the force on the bird; the direction of the force on the air (downwards) is opposite the direction of the force on the bird (upwards). Action-reaction force pairs make it possible for birds to fly. ...
... The size of the force on the air equals the size of the force on the bird; the direction of the force on the air (downwards) is opposite the direction of the force on the bird (upwards). Action-reaction force pairs make it possible for birds to fly. ...
Newton`s Laws and Motion
... Law of conservation of momentum: – momentum= mass x velocity – Momentum of an object does not change unless its mass changes, its velocity changes, or both change – If there is no outside force acting, momentum will not change ...
... Law of conservation of momentum: – momentum= mass x velocity – Momentum of an object does not change unless its mass changes, its velocity changes, or both change – If there is no outside force acting, momentum will not change ...
Newton`s Laws and Motion Air resistance
... Law of conservation of momentum: – momentum= mass x velocity – Momentum of an object does not change unless its mass changes, its velocity changes, or both change – If there is no outside force acting, momentum will not change ...
... Law of conservation of momentum: – momentum= mass x velocity – Momentum of an object does not change unless its mass changes, its velocity changes, or both change – If there is no outside force acting, momentum will not change ...
Physical Science Test #1 – Review Guide Properties of Matter
... Classification of Matter 17. Matter is anything that has ___________________ and has ____________________. 18. A ____________________________________ is made up of one kind of atom or molecule (like elements and compounds). 19. A __________________________ is made up of more than one kind of atom or ...
... Classification of Matter 17. Matter is anything that has ___________________ and has ____________________. 18. A ____________________________________ is made up of one kind of atom or molecule (like elements and compounds). 19. A __________________________ is made up of more than one kind of atom or ...
Force and Acceleration
... the track and run the string from the cart over the pulley. Tape the plastic card to the end of the cart making sure it isn’t low enough to touch the track. ...
... the track and run the string from the cart over the pulley. Tape the plastic card to the end of the cart making sure it isn’t low enough to touch the track. ...
Chapter 8 Motion and Forces - Mrs. Cavanaugh's PbWiki
... What affects gravitational force? • Mass and distance • The greater the mass of an object=the larger the gravitational force it exerts on the other. • If the distance between two objects is doubled, the gravitational force bewteen them decreases to ¼ its original value • If the distance is tripled, ...
... What affects gravitational force? • Mass and distance • The greater the mass of an object=the larger the gravitational force it exerts on the other. • If the distance between two objects is doubled, the gravitational force bewteen them decreases to ¼ its original value • If the distance is tripled, ...
Chapter 4 Forces and Newton’s Laws of Motion continued
... A) If mass of the object is known, and all forces acting on the object are known, then the acceleration vector can be calculated. B) If the acceleration vector and mass of an object are known, then the Net Force acting on the object can be calculated. It may surprise you! C) If the acceleration vect ...
... A) If mass of the object is known, and all forces acting on the object are known, then the acceleration vector can be calculated. B) If the acceleration vector and mass of an object are known, then the Net Force acting on the object can be calculated. It may surprise you! C) If the acceleration vect ...
Newton`s Laws of Motion
... Aristotle thought that if there was NO FORCE, then there was no movement, except for Natural motion Copernicus, looking at astronomical data, reasoned that the Earth was moving around the sun. This went against the church which said Earth was the center of the universe. ...
... Aristotle thought that if there was NO FORCE, then there was no movement, except for Natural motion Copernicus, looking at astronomical data, reasoned that the Earth was moving around the sun. This went against the church which said Earth was the center of the universe. ...
Unit 8 Student Notes
... a projectile. A thrown stone falls beneath the straight line it would follow with no gravity. The stone curves as it falls. Interestingly, this familiar curve is the result of two kinds of motion occurring at the same time. One kind is the straight-down vertical motion. The other is the horizontal m ...
... a projectile. A thrown stone falls beneath the straight line it would follow with no gravity. The stone curves as it falls. Interestingly, this familiar curve is the result of two kinds of motion occurring at the same time. One kind is the straight-down vertical motion. The other is the horizontal m ...
phys1443-fall07
... People have been very curious about the stars in the sky, making observations for a long time. The data people collected, however, have not been explained until Newton has discovered the law of gravitation. Every particle in the Universe attracts every other particle with a force that is directly pr ...
... People have been very curious about the stars in the sky, making observations for a long time. The data people collected, however, have not been explained until Newton has discovered the law of gravitation. Every particle in the Universe attracts every other particle with a force that is directly pr ...
Net force = 0 - University of Iowa Physics
... • It is the law which explains how things move - dynamics • If a net force is applied to an object it will accelerate – change its velocity • It includes the law of inertia if there is no force, F = 0, then the acceleration = 0 the velocity doesn’t change no force is needed to keep an object m ...
... • It is the law which explains how things move - dynamics • If a net force is applied to an object it will accelerate – change its velocity • It includes the law of inertia if there is no force, F = 0, then the acceleration = 0 the velocity doesn’t change no force is needed to keep an object m ...
Test 3 Version 3 1. Milky Way halo stars follow: (a) differential
... 4. The observed distribution of globular clusters indicates that the gas cloud from which the galaxy formed was: (a) disk-shaped, (b) spherical, (c) highly elliptical. 5. The disk-like shape of our galaxy provides evidence that the early galaxy: (a) was a strong x-ray emitter, (b) had a high tempera ...
... 4. The observed distribution of globular clusters indicates that the gas cloud from which the galaxy formed was: (a) disk-shaped, (b) spherical, (c) highly elliptical. 5. The disk-like shape of our galaxy provides evidence that the early galaxy: (a) was a strong x-ray emitter, (b) had a high tempera ...
Lecture 8 (Feb 8) - West Virginia University
... magnitude of the tension force exerted by the rope on the sled and that of the normal force exerted by the hill on the sled. 1st step: Draw the free body diagram. Which forces act on the sled (dark blue arrows)? ...
... magnitude of the tension force exerted by the rope on the sled and that of the normal force exerted by the hill on the sled. 1st step: Draw the free body diagram. Which forces act on the sled (dark blue arrows)? ...
Modified Newtonian dynamics
In physics, modified Newtonian dynamics (MOND) is a theory that proposes a modification of Newton's laws to account for observed properties of galaxies. Created in 1983 by Israeli physicist Mordehai Milgrom, the theory's original motivation was to explain the fact that the velocities of stars in galaxies were observed to be larger than expected based on Newtonian mechanics. Milgrom noted that this discrepancy could be resolved if the gravitational force experienced by a star in the outer regions of a galaxy was proportional to the square of its centripetal acceleration (as opposed to the centripetal acceleration itself, as in Newton's Second Law), or alternatively if gravitational force came to vary inversely with radius (as opposed to the inverse square of the radius, as in Newton's Law of Gravity). In MOND, violation of Newton's Laws occurs at extremely small accelerations, characteristic of galaxies yet far below anything typically encountered in the Solar System or on Earth.MOND is an example of a class of theories known as modified gravity, and is an alternative to the hypothesis that the dynamics of galaxies are determined by massive, invisible dark matter halos. Since Milgrom's original proposal, MOND has successfully predicted a variety of galactic phenomena that are difficult to understand from a dark matter perspective. However, MOND and its generalisations do not adequately account for observed properties of galaxy clusters, and no satisfactory cosmological model has been constructed from the theory.