How Far is far ?
... Yet another method results from the fact that as we look out farther, we look back in time : light takes billions of years to reach us from the edges of the universe. Since clusters of galaxies were denser and hotter in the early universe, the farther away a galaxy cluster is, the hotter it should ...
... Yet another method results from the fact that as we look out farther, we look back in time : light takes billions of years to reach us from the edges of the universe. Since clusters of galaxies were denser and hotter in the early universe, the farther away a galaxy cluster is, the hotter it should ...
Newton`s Laws of Motion
... When mass is in kilograms and acceleration is in m/s/s, the unit of force is in newtons (N). One newton is equal to the force required to accelerate one kilogram of mass at one meter/second/second. ...
... When mass is in kilograms and acceleration is in m/s/s, the unit of force is in newtons (N). One newton is equal to the force required to accelerate one kilogram of mass at one meter/second/second. ...
Newton`s Laws jeopardy
... represents one second (8 total), the speed of a can of coke dropped out of this plane (there is no wind resistance). ...
... represents one second (8 total), the speed of a can of coke dropped out of this plane (there is no wind resistance). ...
Newton`s Laws of Motion Notes
... Newton’s Laws of Motion Notes 2014-2015 force push or pull; usually more than one force is acting on an object ...
... Newton’s Laws of Motion Notes 2014-2015 force push or pull; usually more than one force is acting on an object ...
Study Guide - Motion Name Key Date Pd 1. An object is in ___
... forces acting on an object do not equal zero. 29. Suppose you were on in-line skates and you toss a backpack full of heavy books toward your friend. What do you think will happen to you? Explain your answer in terms of Newton’s third law of motion. This will cause me to move in the opposite directio ...
... forces acting on an object do not equal zero. 29. Suppose you were on in-line skates and you toss a backpack full of heavy books toward your friend. What do you think will happen to you? Explain your answer in terms of Newton’s third law of motion. This will cause me to move in the opposite directio ...
Newton`s Laws 2.2
... A Review of Newton’s Laws of Motion Newton’s First Law: An object at rest remains at rest and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force. Newton’s Second Law: The acceleration of an object depends on the mass of the object a ...
... A Review of Newton’s Laws of Motion Newton’s First Law: An object at rest remains at rest and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force. Newton’s Second Law: The acceleration of an object depends on the mass of the object a ...
Document
... earths surface are affected only by gravity (air resistance is negligible) two basic facts govern their motion: 1. Objects accelerate at the same rate, independent of their mass, size composition. 2 . This gravitational acceleration is constant and so does not change as the object falls. ...
... earths surface are affected only by gravity (air resistance is negligible) two basic facts govern their motion: 1. Objects accelerate at the same rate, independent of their mass, size composition. 2 . This gravitational acceleration is constant and so does not change as the object falls. ...
Newton`s Law of Gravitation Gravitation – Introduction
... Gravitation – Introduction Why do things fall? Why doesn’t everything fall to the center of the Earth? What holds the Earth (and the rest of the Universe) together? Why are there stars, planets and galaxies, not just dilute gas? Aristotle – Earthly physics is different from celestial physics ...
... Gravitation – Introduction Why do things fall? Why doesn’t everything fall to the center of the Earth? What holds the Earth (and the rest of the Universe) together? Why are there stars, planets and galaxies, not just dilute gas? Aristotle – Earthly physics is different from celestial physics ...
Activity
... 1. Place about 1.0-gram of mass (0.001 kg) for the initial hanging mass. 2. Set the cart mass to 399-g (0.399 kg). • The applied net force is the weight of the hanging masses (Fw = mg) minus friction forces. Set Friction to 0.0-N by setting the coefficient of friction to 0.00. 3. Record the total ma ...
... 1. Place about 1.0-gram of mass (0.001 kg) for the initial hanging mass. 2. Set the cart mass to 399-g (0.399 kg). • The applied net force is the weight of the hanging masses (Fw = mg) minus friction forces. Set Friction to 0.0-N by setting the coefficient of friction to 0.00. 3. Record the total ma ...
1 Introduction - Mechanics - College of Engineering
... is a vector quantity. Distinguished as contact or volumetric ...
... is a vector quantity. Distinguished as contact or volumetric ...
Chapter 3 - Mrs. Wiedeman
... Anything that has mass is attracted by gravity Gravity: attractive force between two objects that depends on masses and distance Stronger force? More mass/closer together ...
... Anything that has mass is attracted by gravity Gravity: attractive force between two objects that depends on masses and distance Stronger force? More mass/closer together ...
force
... • The quantity of matter – how much stuff something is made of • On a fundamental level dependent on the number of atoms that make something up • SI Unit : kilograms • An object’s mass can only be changed by changing the object (breaking it, cutting, etc) ...
... • The quantity of matter – how much stuff something is made of • On a fundamental level dependent on the number of atoms that make something up • SI Unit : kilograms • An object’s mass can only be changed by changing the object (breaking it, cutting, etc) ...
Lecture04d
... The window washer pulls down on the rope with a tension force so the rope pulls up on her hands with a tension force The tension in The rope is also applied at the other end of the rope, where it FT attaches to the bucket. So there is another force pulling up on the bucket. The bucket-washer combina ...
... The window washer pulls down on the rope with a tension force so the rope pulls up on her hands with a tension force The tension in The rope is also applied at the other end of the rope, where it FT attaches to the bucket. So there is another force pulling up on the bucket. The bucket-washer combina ...
NEWTON`S LAWS OF MOTION
... • . A gun recoils when it is fired. The recoil is the result of action-reaction force pairs. As the gases from the gunpowder explosion expand, the gun pushes the bullet forwards and the bullet pushes the gun backwards. The acceleration of the recoiling gun is ... A-greater than the acceleration of ...
... • . A gun recoils when it is fired. The recoil is the result of action-reaction force pairs. As the gases from the gunpowder explosion expand, the gun pushes the bullet forwards and the bullet pushes the gun backwards. The acceleration of the recoiling gun is ... A-greater than the acceleration of ...
Sample Exam Questions
... specific questions will not be used this semester. Math questions like those at the end may appear on all exams. Sample Questions for Exam 1: 1. One light year can be defined as a) a year that contains fewer calories than most b) the time required by light to travel to the nearest star beside the Su ...
... specific questions will not be used this semester. Math questions like those at the end may appear on all exams. Sample Questions for Exam 1: 1. One light year can be defined as a) a year that contains fewer calories than most b) the time required by light to travel to the nearest star beside the Su ...
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.