Universal Gravitation
... Universal Gravitation ***** Refer to pages 4 and 8 of packet for planetary data ***** 1. An apparatus like the one Cavendish used to find G has a large lead ball that is 5.9 kg and a small one that is 0.047 kg. Their centers are separated by 0.055 m. Find the force of attraction between them. 2. Us ...
... Universal Gravitation ***** Refer to pages 4 and 8 of packet for planetary data ***** 1. An apparatus like the one Cavendish used to find G has a large lead ball that is 5.9 kg and a small one that is 0.047 kg. Their centers are separated by 0.055 m. Find the force of attraction between them. 2. Us ...
Document
... • Cepheid variables are a type of radially pulsating giant stars named after the star delta Cephei • Cepheids cross the instability strip on the HertzsprungRussel diagram multiple times as they use a He-II ionization zone pulsation mechanism • All RR Lyrae stars have about the same intrinsic brightn ...
... • Cepheid variables are a type of radially pulsating giant stars named after the star delta Cephei • Cepheids cross the instability strip on the HertzsprungRussel diagram multiple times as they use a He-II ionization zone pulsation mechanism • All RR Lyrae stars have about the same intrinsic brightn ...
Inertia First?
... Discard lateral components (a-b) as inertia does not change h is the average expected “unrecovered” height Assume a discovered displacement is “conserved” as momentum Rate of discovery is a free parameter – a purely imaginary velocity vE used to “time” the discoveries Solving for acceleration: a ...
... Discard lateral components (a-b) as inertia does not change h is the average expected “unrecovered” height Assume a discovered displacement is “conserved” as momentum Rate of discovery is a free parameter – a purely imaginary velocity vE used to “time” the discoveries Solving for acceleration: a ...
Unit I: Concept Enhancer
... velocity faster) or you could say you had a greater acceleration. You knew this by the way your feet had to move faster and faster so that you could keep the force constant. So force is directly related to acceleration. You also found that if you pulled on a more massive person that the acceleration ...
... velocity faster) or you could say you had a greater acceleration. You knew this by the way your feet had to move faster and faster so that you could keep the force constant. So force is directly related to acceleration. You also found that if you pulled on a more massive person that the acceleration ...
Ph201_CH4_worksheet
... 5) The motion of a 0.1 kg ball tossed vertically into the air was recorded using a motion detector. The initial velocity for the ball was 5 m/s (see Graph 1). Analysis of the velocity vs. time graph yielded the acceleration of the ball during 3 phases of the motion: upward, near the top and downward ...
... 5) The motion of a 0.1 kg ball tossed vertically into the air was recorded using a motion detector. The initial velocity for the ball was 5 m/s (see Graph 1). Analysis of the velocity vs. time graph yielded the acceleration of the ball during 3 phases of the motion: upward, near the top and downward ...
Unit 1: The Big Picture
... – Edwin Hubble measured approximate distance to nearby Andromeda…no way Milky Way was that large – 3 Types: spiral, elliptical, irregular ...
... – Edwin Hubble measured approximate distance to nearby Andromeda…no way Milky Way was that large – 3 Types: spiral, elliptical, irregular ...
Slide 1
... Uniform Circular Motion The object’s speed is constant but its direction is changing. ...
... Uniform Circular Motion The object’s speed is constant but its direction is changing. ...
Honors Physics - Practice Final Exam
... 54. An object moves in a circular path at a constant speed. Consider the direction of the object’s velocity and acceleration vectors. A. Both vectors point in the same direction. B. The vectors point in opposite directions. C. The vectors are perpendicular. D. The question is meaningless, since the ...
... 54. An object moves in a circular path at a constant speed. Consider the direction of the object’s velocity and acceleration vectors. A. Both vectors point in the same direction. B. The vectors point in opposite directions. C. The vectors are perpendicular. D. The question is meaningless, since the ...
Set #6 - McMaster Physics and Astronomy
... 6. A cylindrical fishing reel has a moment of inertia of I=6.50×10-4 kg·m2 and a radius of 3.88 cm. A friction clutch in the reel exerts a restraining torque of 1.19 N·m if a fish pulls on the line. The fisherman gets a bite, and the reel begins to spin with an angular acceleration of 67.1 rad/s2. W ...
... 6. A cylindrical fishing reel has a moment of inertia of I=6.50×10-4 kg·m2 and a radius of 3.88 cm. A friction clutch in the reel exerts a restraining torque of 1.19 N·m if a fish pulls on the line. The fisherman gets a bite, and the reel begins to spin with an angular acceleration of 67.1 rad/s2. W ...
Astronomy Chapter 17 – Galaxies A. Main Ideas 1. Discovering
... ⇒ Galaxies are separated from each other by enormous distances. Astronomers cannot use parallax to measure such large distances because the angle by which the galaxy’s position changes as we move around the Sun is too small to be measured. Astronomers use the method of standard candles to measure th ...
... ⇒ Galaxies are separated from each other by enormous distances. Astronomers cannot use parallax to measure such large distances because the angle by which the galaxy’s position changes as we move around the Sun is too small to be measured. Astronomers use the method of standard candles to measure th ...
Unit 1
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired objects, so he could avoid seeing them – They became known as Messier Objects, a number preceded by an M. – M31 (the Andromeda galaxy) is ...
... • In the 1700’s, Charles Messier was observing comets, and kept finding objects that while fuzzy, were not comets – He made a list (or catalog) of these undesired objects, so he could avoid seeing them – They became known as Messier Objects, a number preceded by an M. – M31 (the Andromeda galaxy) is ...
Motion in One Dimension (Chapter 2) Describe motion in terms of
... Define work and calculate the work done by a force. Identify where work is being performed in a variety of situations. Calculate the net work on an object, when many forces act upon it. Calculate the kinetic energy for an object. Apply the work-energy theorem to solve problems. Distinguish between t ...
... Define work and calculate the work done by a force. Identify where work is being performed in a variety of situations. Calculate the net work on an object, when many forces act upon it. Calculate the kinetic energy for an object. Apply the work-energy theorem to solve problems. Distinguish between t ...
Forces and acceleration Newton`s 2nd Law
... ** Position the photogate so that it's right next to the leading edge of the card. The photogate should be in gate mode. Press the reset button to reset the time to zero. ** Slowly ease the cart forward (not letting it go) so that it starts the photogate (red light on) and then back the cart up just ...
... ** Position the photogate so that it's right next to the leading edge of the card. The photogate should be in gate mode. Press the reset button to reset the time to zero. ** Slowly ease the cart forward (not letting it go) so that it starts the photogate (red light on) and then back the cart up just ...
Questions - TTU Physics
... If you insist on using symbols, DEFINE all symbols you use! NO credit will be given for answers with ONLY symbols! For parts b & c: Newton’s Laws are about forces. Complete statements of each Law MUST mention forces! a. Briefly state THE THEME OF THE COURSE. (Note: I’ve stated this several times in ...
... If you insist on using symbols, DEFINE all symbols you use! NO credit will be given for answers with ONLY symbols! For parts b & c: Newton’s Laws are about forces. Complete statements of each Law MUST mention forces! a. Briefly state THE THEME OF THE COURSE. (Note: I’ve stated this several times in ...
Newton`s Laws Review
... Newton’s Laws Review Newton’s 1st 1. What is Newton’s 1st law? An object at rest stays at rest and an object in motion stays in motion. Objects do this because of their inertia. 2. Describe what inertia is. Inertia is the resistance of any object to a change in its state of motion (can be moving or ...
... Newton’s Laws Review Newton’s 1st 1. What is Newton’s 1st law? An object at rest stays at rest and an object in motion stays in motion. Objects do this because of their inertia. 2. Describe what inertia is. Inertia is the resistance of any object to a change in its state of motion (can be moving or ...
Chapter 7 Gravitation
... whether or not the correct distance to use was the distance between their centers. At this time he hadn’t proved mathematically that the gravity of the spherical Earth (and moon) is the same as if all its mass were concentrated at its center. ...
... whether or not the correct distance to use was the distance between their centers. At this time he hadn’t proved mathematically that the gravity of the spherical Earth (and moon) is the same as if all its mass were concentrated at its center. ...
02_E2_ws1_key
... Both values are the same because the change in height is the same. d. How does gravitational potential differ from gravitational potential energy? Eg depends on mass, gravitational field strength and change in height. Gravitational potential depends on gravitational field strength and change in heig ...
... Both values are the same because the change in height is the same. d. How does gravitational potential differ from gravitational potential energy? Eg depends on mass, gravitational field strength and change in height. Gravitational potential depends on gravitational field strength and change in heig ...
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.