• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Chap04
Chap04

... or water, the fluid exerts a drag force on the moving object in the direction opposite to its motion. A drag force is the force exerted by a fluid on the object moving through the fluid. This force is dependent on the motion of the object, the properties of the object, and the properties of the flui ...
Torque
Torque

... of rotation and the line of force. Torques are vectors. Strictly speaking, the direction of a torque should be perpendicular to (either into or out of) the plane defined by the force and its lever arm. However, for simplicity, we will define the direction of a torque as either clockwise (CW) or coun ...
NewtonsLaws
NewtonsLaws

... or a bowling ball? Explain why. Explain which has greater inertia: a jet plane sitting on the runway or a speeding car? ...
Activities
Activities

... This means that when the planet is closer to the Sun, it moves faster than it does when it is far away. This also means that a planet with a highly eccentric orbit will move at a variety of speeds, while a planet with a nearly-circular orbit will only vary a little in its speed. • Third Law: The squ ...
THEORETICAL SUBJECTS General Physics Course –Part I 1 term
THEORETICAL SUBJECTS General Physics Course –Part I 1 term

... b. Second Newton’s law. c. Third Newton’s law. 3) In agreement with the Newton’s laws, explain the conditions for a body to be in equilibrium (rest or movement with constant velocity) in case when subjected to many forces. In what situation the body moves with: a. constant acceleration b. time depen ...
Recipes for ULX formation: necessary ingredients and garnishments
Recipes for ULX formation: necessary ingredients and garnishments

college physics
college physics

What causes motion
What causes motion

Document
Document

Newton's Second Law of Motion
Newton's Second Law of Motion

Newton`s 2nd Law WebPkt
Newton`s 2nd Law WebPkt

... Noah Formula objects, arguing that the object could not have any horizontal motion if there are only vertical forces acting upon it. Noah claims that the object must be at rest, perhaps on a table or floor. After all, says Noah, an object experiencing a balance of forces will be at rest. Who do you ...
States, Causes, and the Law of Inertia Author(s): Robert
States, Causes, and the Law of Inertia Author(s): Robert

Chapter 7 - Gravitation
Chapter 7 - Gravitation

Chapter 7 Text
Chapter 7 Text

... between the centers of the planet and the Sun. That is, F is proportional to 1/r 2. The force, F, acts in the direction of the line connecting the centers of the two objects. It is quoted that the sight of a falling apple made Newton wonder if the force that caused the apple to fall might extend to ...
Document(Word Version)
Document(Word Version)

... First, set a mass on one of the springs. Turn on maximum friction and let the mass come to rest. Move the dotted line to show where the equilibrium point is. Now turn off friction and move the mass to another spring at just the equilibrium point so it remains almost at rest. (This will restart the e ...
High precision astrometry as a tool for Fundamental
High precision astrometry as a tool for Fundamental

... in the external Solar System: the QVADIS collaboration goals M. Gai, A. Vecchiato Istituto Nazionale di Astrofisica [INAF] Osservatorio Astrofisico di Torino [OATo] ...
Physics 11 Kinematics Sample Test
Physics 11 Kinematics Sample Test

... 11. You are going to catch a baseball, which is travelling at 20.0 m/s. It won’t hurt as much if you pull your hand back while catching the ball. If you want the deceleration of the ball to be -210.0 m/s2, then how far should you pull your hand back while catching the ball? [3] 12. Two cars leave th ...
Review sheet 4 Newton
Review sheet 4 Newton

Contact Improvisation: Concepts of Physics Transformed into Art
Contact Improvisation: Concepts of Physics Transformed into Art

Chapter 7 Rotational Motion 7.1 Angular Quantities Homework # 51
Chapter 7 Rotational Motion 7.1 Angular Quantities Homework # 51

... 0.0245 N acts as the ball rotates. a.) What is the moment of inertia of the ball? b.) What torque must be applied to the ball to keep it rotating at a constant angular velocity? 04. A pottery wheel is a uniform cylinder that has a diameter of 30.48 cm and a mass of 5.00 kg. The wheel starts from res ...
Part23 - FacStaff Home Page for CBU
Part23 - FacStaff Home Page for CBU

... and with air resistance (AR) • we have FAR = bv2 directed up. Newton’s Second Law gives (for 1-D): -mg + bv2 = ma , or -mg + bv2 = m(dv/dt) which is a differential equation with v(t) being the solution. ...
Titelseite
Titelseite

... active regions in the galaxy as well as the objects that can be found there. Elements that are generated at different times in the life of stars: Their detection and relative occurrence can help us to test star models. Instable elements with a long lifetime give information about the element‘s avera ...
Powerpoint
Powerpoint

... Newton 0th Law Objects are dumb - They have no memory of the past and cannot predict the future. Objects only know what is acting directly on them right now Newton's 1st Law An object that is at rest will remain at rest and an object that is moving will continue to move in a straight line with const ...
week 1
week 1

... GENERAL CURVILINEAR MOTION (Section 12.4) A particle moving along a curved path undergoes curvilinear motion. Since the motion is often three-dimensional, vectors are used to describe the motion. A particle moves along a curve defined by the path function, s. The position of the particle at any ins ...
July 2016 Exam Review
July 2016 Exam Review

< 1 ... 58 59 60 61 62 63 64 65 66 ... 432 >

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.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report