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Energy, Angular momentum and orbits
Energy, Angular momentum and orbits

Astrophysics I Solution 8
Astrophysics I Solution 8

... Figure 1: Energy per unit satellite mass as a function of radius for a satellite on circular orbit around the Earth. 3. Due to friction with the Earth’s atmosphere, the satellite will lose a small amount of energy and therefore slow down. This means that its velocity will decrease at first, causing ...
Document
Document

Physics--Chapter 5: Work and Energy
Physics--Chapter 5: Work and Energy

Work, Energy, and Power
Work, Energy, and Power

Formulas velocity(speed) = distance/time a=vf
Formulas velocity(speed) = distance/time a=vf

... Formulas ...
Name
Name

Time for Work
Time for Work

• Gravity causes all objects to accelerate toward Earth at a rate of 9
• Gravity causes all objects to accelerate toward Earth at a rate of 9

kinetic energy
kinetic energy

... or work is stored when a force does work “against” a force such as the gravitational force or a Hooke’s Law (spring) force.  Forces that store or hide energy are called conservative forces. ...
Phys 207 E = K + U is constant!!!
Phys 207 E = K + U is constant!!!

Motion, Forces, and Simple Machines
Motion, Forces, and Simple Machines

... States: An object at rest stays at rest unless an unbalanced force acts on it. *An object moving in a straight line at constant speed will continue doing that unless acted on by a force. This force is called friction. It is a force that resists motion between 2 surfaces that are in contact. It alway ...
Newton`s Laws
Newton`s Laws

... An English Mathematician and Physicist that formulated the three laws of motion, law of universal gravitation and invented calculus before the age of 30 Newton’s discoveries helped to answer many questions such as: what causes tides, how do the planets move and why do objects of different masses fal ...
Spring problem and Hooke`s Law
Spring problem and Hooke`s Law

An X-ray photon of wavelength 6 pm (1 pm = 10^-12 m
An X-ray photon of wavelength 6 pm (1 pm = 10^-12 m

Chapter 7 Conserva)on of Energy (cont`d)
Chapter 7 Conserva)on of Energy (cont`d)

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1st semester physci Final Exam review

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Class 6 - Eqns of Motion

Conservation of Mechanical Energy
Conservation of Mechanical Energy

... Conservative and non-conservative forces: Non-conservative forces: oWork does depend on path. oA force is non-conservative if it causes a change in mechanical energy (mechanical energy is the sum of kinetic and potential energy). oThis energy cannot be converted back into other forms of energy (irr ...
Momentum - SCHOOLinSITES
Momentum - SCHOOLinSITES

... Momentum is inertia in motion. ...
Newton`s Third Law
Newton`s Third Law

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What is Electricity - Electricity Authority

Kreutter: Work and Energy Name: Date:______ Period:______ Work
Kreutter: Work and Energy Name: Date:______ Period:______ Work

Homework 4: Chapter 5 – Questions: 2,5,7,8,9,16,18,22 and
Homework 4: Chapter 5 – Questions: 2,5,7,8,9,16,18,22 and

Physics Problem Checklist
Physics Problem Checklist

... This is a checklist for solving mechanics problems involving moving objects with mechanical energy and momentum and possibly under the influences of forces. It will not be useful for more simple kinematics problems, where you are told something about an objects motion (position, velocity, accelerati ...
< 1 ... 313 314 315 316 317 318 319 320 321 ... 437 >

Relativistic mechanics

In physics, relativistic mechanics refers to mechanics compatible with special relativity (SR) and general relativity (GR). It provides a non-quantum mechanical description of a system of particles, or of a fluid, in cases where the velocities of moving objects are comparable to the speed of light c. As a result, classical mechanics is extended correctly to particles traveling at high velocities and energies, and provides a consistent inclusion of electromagnetism with the mechanics of particles. This was not possible in Galilean relativity, where it would be permitted for particles and light to travel at any speed, including faster than light. The foundations of relativistic mechanics are the postulates of special relativity and general relativity. The unification of SR with quantum mechanics is relativistic quantum mechanics, while attempts for that of GR is quantum gravity, an unsolved problem in physics.As with classical mechanics, the subject can be divided into ""kinematics""; the description of motion by specifying positions, velocities and accelerations, and ""dynamics""; a full description by considering energies, momenta, and angular momenta and their conservation laws, and forces acting on particles or exerted by particles. There is however a subtlety; what appears to be ""moving"" and what is ""at rest""—which is termed by ""statics"" in classical mechanics—depends on the relative motion of observers who measure in frames of reference.Although some definitions and concepts from classical mechanics do carry over to SR, such as force as the time derivative of momentum (Newton's second law), the work done by a particle as the line integral of force exerted on the particle along a path, and power as the time derivative of work done, there are a number of significant modifications to the remaining definitions and formulae. SR states that motion is relative and the laws of physics are the same for all experimenters irrespective of their inertial reference frames. In addition to modifying notions of space and time, SR forces one to reconsider the concepts of mass, momentum, and energy all of which are important constructs in Newtonian mechanics. SR shows that these concepts are all different aspects of the same physical quantity in much the same way that it shows space and time to be interrelated. Consequently, another modification is the concept of the center of mass of a system, which is straightforward to define in classical mechanics but much less obvious in relativity - see relativistic center of mass for details.The equations become more complicated in the more familiar three-dimensional vector calculus formalism, due to the nonlinearity in the Lorentz factor, which accurately accounts for relativistic velocity dependence and the speed limit of all particles and fields. However, they have a simpler and elegant form in four-dimensional spacetime, which includes flat Minkowski space (SR) and curved spacetime (GR), because three-dimensional vectors derived from space and scalars derived from time can be collected into four vectors, or four-dimensional tensors. However, the six component angular momentum tensor is sometimes called a bivector because in the 3D viewpoint it is two vectors (one of these, the conventional angular momentum, being an axial vector).
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