chapter8_PC - Wikispaces : gandell
... Often the nature of the problem will suggest a convenient location for the axis When solving a problem, you must specify an axis of rotation ...
... Often the nature of the problem will suggest a convenient location for the axis When solving a problem, you must specify an axis of rotation ...
CONTINUING GALACTIC FORMATION
... very small stars may form also and can burn H2 for a short time as the star is forming in the gravitational field of the galactic nucleus, and not solely by its own mass. Since the visible galaxy is about 45 million years old, it must regenerate one 45 millionth of this each year. If the Galaxy con ...
... very small stars may form also and can burn H2 for a short time as the star is forming in the gravitational field of the galactic nucleus, and not solely by its own mass. Since the visible galaxy is about 45 million years old, it must regenerate one 45 millionth of this each year. If the Galaxy con ...
South Pasadena A.P. Physics Name Chapter 8 Rotational Motion
... and is accelerated by a force of 150 N at a radius of 1 m from its center. If this force is applied at an angle of 90° from the line of action for a time of 0.5 seconds, what is the final rotational velocity, ω, of the merry-goround? ...
... and is accelerated by a force of 150 N at a radius of 1 m from its center. If this force is applied at an angle of 90° from the line of action for a time of 0.5 seconds, what is the final rotational velocity, ω, of the merry-goround? ...
Overview - Connect a Million Minds
... about his path to the goal line as well as the position of the defender who will try to stop him. In this example, the receiver can think of his path to the goal line and his path to the defender as the sides or legs of a right triangle. He also knows that the defender will be calculating his own “a ...
... about his path to the goal line as well as the position of the defender who will try to stop him. In this example, the receiver can think of his path to the goal line and his path to the defender as the sides or legs of a right triangle. He also knows that the defender will be calculating his own “a ...
Static Equilibrium
... The torque due to the gravitational force on an object of mass M is the force Mg acting at the center of gravity of the object If g is uniform over the object, then the center of gravity of the object coincides with its center of mass If the object is homogeneous and symmetrical, the center of gravi ...
... The torque due to the gravitational force on an object of mass M is the force Mg acting at the center of gravity of the object If g is uniform over the object, then the center of gravity of the object coincides with its center of mass If the object is homogeneous and symmetrical, the center of gravi ...
Introduction to Galaxies - West Jefferson Local Schools
... able to measure the distance to the “Great Nebula in Andromeda” (M 31, previous slide) and found its distance to be much larger than the diameter of the Milky Way. This meant that M 31, and by extension other spiral nebulae, were galaxies in their own right, comparable to or even larger than the Mil ...
... able to measure the distance to the “Great Nebula in Andromeda” (M 31, previous slide) and found its distance to be much larger than the diameter of the Milky Way. This meant that M 31, and by extension other spiral nebulae, were galaxies in their own right, comparable to or even larger than the Mil ...
the Note
... When two objects collide with each other, their momentum will change. However the total momentum of the system will not change if there are no external forces acting on the objects. External forces are forces such as friction or the brakes on a car. Law of Conservation of Momentum: The total linear ...
... When two objects collide with each other, their momentum will change. However the total momentum of the system will not change if there are no external forces acting on the objects. External forces are forces such as friction or the brakes on a car. Law of Conservation of Momentum: The total linear ...
PH607 – Galaxies
... Thus, within a radius of 20 kpc we get a mass of MG = 2x1011 M If the light distribution of the Galaxy were proportional to the mass distribution, then the two mass estimates above would imply that the amount of light emitted by the 8 kpc region would be the same as the region from 8 - 20 kpc... whe ...
... Thus, within a radius of 20 kpc we get a mass of MG = 2x1011 M If the light distribution of the Galaxy were proportional to the mass distribution, then the two mass estimates above would imply that the amount of light emitted by the 8 kpc region would be the same as the region from 8 - 20 kpc... whe ...
Chapter4.1 - Department of Physics & Astronomy
... • How does gravity cause tides? – The Moon’s gravity stretches Earth and its oceans. • Why do all objects fall at the same rate? – Mass of object in Newton’s second law exactly cancels mass in law of gravitation. © 2010 Pearson Education, Inc. ...
... • How does gravity cause tides? – The Moon’s gravity stretches Earth and its oceans. • Why do all objects fall at the same rate? – Mass of object in Newton’s second law exactly cancels mass in law of gravitation. © 2010 Pearson Education, Inc. ...
force of gravity
... • So if the separation distance is doubled (increased by a factor of 2), then the force of gravity is decreased by a factor of four (2 raised to the second power). And if the separation distance is tripled (increased by a factor of 3), then the force of gravity is decreased by a factor of nine (3 r ...
... • So if the separation distance is doubled (increased by a factor of 2), then the force of gravity is decreased by a factor of four (2 raised to the second power). And if the separation distance is tripled (increased by a factor of 3), then the force of gravity is decreased by a factor of nine (3 r ...
REGULATION 2013 ACADEMIC YEAR 2014
... 39. What is law of conservation of energy? 40. What is meant by momentum? 41. What is meant by impulse? 42. Write the equation to find out the Impulse. 43. Write short notes on potential Energy. 44. Write the Pappus and Guldinius theorems.(Apr/May12) 45. Define principal moment of inertia. 46. Write ...
... 39. What is law of conservation of energy? 40. What is meant by momentum? 41. What is meant by impulse? 42. Write the equation to find out the Impulse. 43. Write short notes on potential Energy. 44. Write the Pappus and Guldinius theorems.(Apr/May12) 45. Define principal moment of inertia. 46. Write ...
4.3 Newton`s Second Law of Motion
... somewhat with speed; there may be some dependence on the surface area of the objects. Also, remember that these equations are for the magnitude of the frictional force—it is always perpendicular to the normal force. (Why?) Note: Friction ONLY depends on the MATERIALS sliding against each other, NOT ...
... somewhat with speed; there may be some dependence on the surface area of the objects. Also, remember that these equations are for the magnitude of the frictional force—it is always perpendicular to the normal force. (Why?) Note: Friction ONLY depends on the MATERIALS sliding against each other, NOT ...
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.