5Kepler2s
... 1 Planets orbit the Sun in elliptical orbits because only one specific initial velocity would produce a circular orbit ...
... 1 Planets orbit the Sun in elliptical orbits because only one specific initial velocity would produce a circular orbit ...
Law of Inertia
... to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the body” * “in the same direction as the net force” ◦ a in the same direction of body’s motion speed up ◦ a in opposite direction of body’s motion slow down ◦ a at right angles t ...
... to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the body” * “in the same direction as the net force” ◦ a in the same direction of body’s motion speed up ◦ a in opposite direction of body’s motion slow down ◦ a at right angles t ...
Chapter 7 Review Answers
... 100,000 ly across, meaning that it would take 100,000 years travelling at the speed of light to get across the galaxy. 14.All galaxies with a high rate of production of stars have lots of dust and gas, which are the birth place of stars. 15.The night sky would be different in one of two ways (make s ...
... 100,000 ly across, meaning that it would take 100,000 years travelling at the speed of light to get across the galaxy. 14.All galaxies with a high rate of production of stars have lots of dust and gas, which are the birth place of stars. 15.The night sky would be different in one of two ways (make s ...
unit: describing motion
... 24. How do you calculate average acceleration? Be able to use this formula to solve problems given two of the variables. 25. Define centripetal acceleration. 26. Be able to interpret speed, velocity, distance, and acceleration on a graph. UNIT: FORCES Text: Lesson 3: Forces 27. What is a force? How ...
... 24. How do you calculate average acceleration? Be able to use this formula to solve problems given two of the variables. 25. Define centripetal acceleration. 26. Be able to interpret speed, velocity, distance, and acceleration on a graph. UNIT: FORCES Text: Lesson 3: Forces 27. What is a force? How ...
Gravitation and Orbital Motion
... 13. (optional: summing 2 gravitational forces acting on an object) The gravitational pull of the Moon is partially responsible for the tides of the sea. The Moon pulls on you, too, so if you are on a diet it is better to weigh yourself when this heavenly body is directly overhead! If you have a mass ...
... 13. (optional: summing 2 gravitational forces acting on an object) The gravitational pull of the Moon is partially responsible for the tides of the sea. The Moon pulls on you, too, so if you are on a diet it is better to weigh yourself when this heavenly body is directly overhead! If you have a mass ...
Circular Motion
... A newspaper report reads in part, “ The space shuttle orbits Earth at an altitude of nearly 200 miles and is traveling at a speed of 18,000 mph. The shuttle remains in orbit because the gravitational force pulling it toward Earth is balanced by the centrifugal force (the force of inertia) that is pu ...
... A newspaper report reads in part, “ The space shuttle orbits Earth at an altitude of nearly 200 miles and is traveling at a speed of 18,000 mph. The shuttle remains in orbit because the gravitational force pulling it toward Earth is balanced by the centrifugal force (the force of inertia) that is pu ...
Mastering Physics Assignment 1 Mastering Physics Assignment 2
... An inertial reference frame is one that is not accelerated (moves at constant velocity, including zero velocity). • the law of inertia (first law) applies in an inertial frame – objects at rest remain at rest if no net force acts on them. • law of inertia does not apply in an accelerated (noninertia ...
... An inertial reference frame is one that is not accelerated (moves at constant velocity, including zero velocity). • the law of inertia (first law) applies in an inertial frame – objects at rest remain at rest if no net force acts on them. • law of inertia does not apply in an accelerated (noninertia ...
Worksheet - 2
... a) With what velocity will it strike the ground? b) After what time will it strike the ground? 10. A car accelerating uniformly from 15m/sec to 20 m/sec in 8 sec. calculate a) its acceleration b)The distance covered by the car in that time. 11. Define the following terms a) Force b) Balanced forces. ...
... a) With what velocity will it strike the ground? b) After what time will it strike the ground? 10. A car accelerating uniformly from 15m/sec to 20 m/sec in 8 sec. calculate a) its acceleration b)The distance covered by the car in that time. 11. Define the following terms a) Force b) Balanced forces. ...
Neutron Stars and Black Holes - School
... Before any evidence of black holes existed they were known to be a theoretical possibility. After a supernova explosion there remains an incredibly dense neutron star. If the mass of the Sun from which it originated was great enough then the neutron star could be a black hole. The gravitational fiel ...
... Before any evidence of black holes existed they were known to be a theoretical possibility. After a supernova explosion there remains an incredibly dense neutron star. If the mass of the Sun from which it originated was great enough then the neutron star could be a black hole. The gravitational fiel ...
Variation of g (acceleration due to gravity) - cal
... The total acceleration of a body is found by vector addition of the opposite of the actual acceleration (in the sense of rate of change of velocity) and a vector of 1 g downward for the ordinary gravity (or in space, the gravity there). For example, being accelerated upward with an acceleration of 1 ...
... The total acceleration of a body is found by vector addition of the opposite of the actual acceleration (in the sense of rate of change of velocity) and a vector of 1 g downward for the ordinary gravity (or in space, the gravity there). For example, being accelerated upward with an acceleration of 1 ...
News Release - האוניברסיטה העברית
... indeed created stars at a very rapid rate, but this does not appear to be at all a result of galactic mergers,” says Prof. Dekel. The astronomical observations were led by researchers in Garching, Germany, headed by Prof. Reinhard Genzel of the Max Planck Institute, whose group is collaborating with ...
... indeed created stars at a very rapid rate, but this does not appear to be at all a result of galactic mergers,” says Prof. Dekel. The astronomical observations were led by researchers in Garching, Germany, headed by Prof. Reinhard Genzel of the Max Planck Institute, whose group is collaborating with ...
Content Area: Newtonian Mechanics Unit: 5 Topic (s): Circular
... http://www.physicsclassroom.com/calcpad/circgrav/problems ...
... http://www.physicsclassroom.com/calcpad/circgrav/problems ...
Newton`s Law practice worksheet
... Part I: Fill in the blanks below to state Newton’s three laws of motion: ...
... Part I: Fill in the blanks below to state Newton’s three laws of motion: ...
Intro to/Review of Newtonian Mechanics (Symon Chapter One)
... when a body does not have a net force acting on it, its acceleration is zero. It was a very significant development in Physics, however, since it contradicted the previous assertion of Aristotelean Physics that the natural state of any material object was to be at rest. One of the most fundamental c ...
... when a body does not have a net force acting on it, its acceleration is zero. It was a very significant development in Physics, however, since it contradicted the previous assertion of Aristotelean Physics that the natural state of any material object was to be at rest. One of the most fundamental c ...
lecture4
... The direction of the gravitational force is attractive, directed along the line separating the two masses. ...
... The direction of the gravitational force is attractive, directed along the line separating the two masses. ...
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.