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Physical Quantities and Units
Physical Quantities and Units

... Field Line / Line of Force – Represents the direction in which a small test mass would experience a force if placed in the field Uniform Field – A field within which the field strength is the same at all points Gravitational Field Strength, g at any point in the field - force per unit mass on a smal ...
Dynamics: Newton`s Laws
Dynamics: Newton`s Laws

Slides - University of Toronto Physics
Slides - University of Toronto Physics

... • Gravity pulls it downward. • To balance the force of gravity, the upward pressure on the bottom surface must be greater than the downward pressure on the top surface: “buoyancy” p2 – p1 = –ρg (y2 – y1) • This is the equation for the pressure of an incompressible fluid in hydrodynamic equilibrium i ...
Force, Acceleration, and Newton*s Laws
Force, Acceleration, and Newton*s Laws

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Angular Kinetics

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Physics of Theatre Presentation

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1 CHAPTER 21 CENTRAL FORCES AND EQUIVALENT

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The gravitational interaction of light: from weak to strong fields

... and generalized in the present paper using a new approach based on a generalization to null rays of the gravitoelectromagnetic Lorentz force of linearized gravity. The analysis is then extended to the realm of exact pp–wave solutions of the Einstein equations, and a physical explanation is given of ...
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Grades 9-12 Physics

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... change in velocity is vi + vf and the produces a higher change in momentum than just vi by itself. 7) A, again as the stated by the previous problem the bouncy ball has a higher impulse and that results in more force on the door. 8) C, because b is less than c because 9) D, We both know that F=ma an ...
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PhysicalScienceLawsofMotion(Ch.2)

... applies an equal force in the opposite direction on the first object. • The forces of a force pair do not cancel because they act on different objects. • According to the law of conservation of momentum, momentum is conserved during a collision unless an outside force acts on the colliding objects. ...
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Unequal Arm Balance An equal arm analytical balance suffers from

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Newton`s Laws - Western Reserve Public Media

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Physics218_lecture_009

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HS-SCI-CP -- Chapter 7- Circular Motion and

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Chapter One: Introduction

... touched together and then placed 3.5cm apart in air. With what force do they act on each other? Is the force one of attraction or repulsion? 7. Four identical conducting spheres, A, B, C and D are suspended by silk threads. Ball A is touched by a charged rod and then each of the other three is broug ...
APB jeopardy
APB jeopardy

Gravitational Potential Energy
Gravitational Potential Energy

... to this as the PEg gained by the object, recognizing that this is energy stored in the gravitational eld of Earth. Why do we use the word system? Potential energy is a property of a system rather than of a single objectdue to its physical position. ...
Friction Lab - Oakland Schools Moodle
Friction Lab - Oakland Schools Moodle

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Q - Moodle NTOU

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CT_electrostatics

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Joints - Continuity 6

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Gravity

Gravity or gravitation is a natural phenomenon by which all things with mass are brought towards (or 'gravitate' towards) one another including stars, planets, galaxies and even light and sub-atomic particles. Gravity is responsible for the complexity in the universe, by creating spheres of hydrogen, igniting them under pressure to form stars and grouping them into galaxies. Without gravity, the universe would be an uncomplicated one, existing without thermal energy and composed only of equally spaced particles. On Earth, gravity gives weight to physical objects and causes the tides. Gravity has an infinite range, and it cannot be absorbed, transformed, or shielded against.Gravity is most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915) which describes gravity, not as a force, but as a consequence of the curvature of spacetime caused by the uneven distribution of mass/energy; and resulting in time dilation, where time lapses more slowly in strong gravitation. However, for most applications, gravity is well approximated by Newton's law of universal gravitation, which postulates that gravity is a force where two bodies of mass are directly drawn (or 'attracted') to each other according to a mathematical relationship, where the attractive force is proportional to the product of their masses and inversely proportional to the square of the distance between them. This is considered to occur over an infinite range, such that all bodies (with mass) in the universe are drawn to each other no matter how far they are apart.Gravity is the weakest of the four fundamental interactions of nature. The gravitational attraction is approximately 10−38 times the strength of the strong force (i.e. gravity is 38 orders of magnitude weaker), 10−36 times the strength of the electromagnetic force, and 10−29 times the strength of the weak force. As a consequence, gravity has a negligible influence on the behavior of sub-atomic particles, and plays no role in determining the internal properties of everyday matter (but see quantum gravity). On the other hand, gravity is the dominant force at the macroscopic scale, that is the cause of the formation, shape, and trajectory (orbit) of astronomical bodies, including those of asteroids, comets, planets, stars, and galaxies. It is responsible for causing the Earth and the other planets to orbit the Sun; for causing the Moon to orbit the Earth; for the formation of tides; for natural convection, by which fluid flow occurs under the influence of a density gradient and gravity; for heating the interiors of forming stars and planets to very high temperatures; for solar system, galaxy, stellar formation and evolution; and for various other phenomena observed on Earth and throughout the universe.In pursuit of a theory of everything, the merging of general relativity and quantum mechanics (or quantum field theory) into a more general theory of quantum gravity has become an area of research.
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