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linear momentum
linear momentum

... What is the centre of mass of an object? Consider a bat thrown into the air. If you look closely, you will find that one special point of the bat moves in a simple parabolic path, just as a particle would if tossed into the air. That special point moves as though (1) the bat's total mass were conce ...
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PHY 110 College Physics I Spring 2010 Final Review Name

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SPH4U: Lecture 14 Notes

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Ch.4-PSII

... 1. Your body converts Chemical PE from your food into the energy you need to function everyday. 2. The Calorie is the unit that food energy is measured. One Calorie = 4180 Joules. 3. Example: A candy bar has 200 calories, how many Joules? a. 1 Cal = 4180 J b. Candy Bar = 200 Cal c. 200 x 4180 = Joul ...
Cornell Notes 3.3 Newton`s Laws November 29, 2011 Pages 91
Cornell Notes 3.3 Newton`s Laws November 29, 2011 Pages 91

... Newton’s Third Law states that every action force creates a reaction force that is equal in strength and opposite in direction. There can never be a single force, alone, without its action-reaction partner. It doesn’t matter which force you call the action and which the reaction. The forces do not c ...
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PY1052 Problem Set 8 – Autumn 2004 Solutions

... choose the centre of the board as the point about which we take our torques. The reason is that if we choose any other point, we will get a torque equation that has three unknowns: Fsupport , mboard and X, where X is the distance from the support to the mass M . This means that we’ll have two equati ...
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Exploring Motion Introduction

... Newton’s three laws of motion describe the interaction of forces that control movement. The first law states that a body in motion will remain in motion unless acted upon by an unbalanced force. The same is true for a body at rest. The second law predicts that when an unbalanced force is applied to ...
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Physical Science 3 Nine Week Study Guide 1.

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Kinetics: Work, Energy and Power 193 8.6 Spatial (3D) Mechanical

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AP Physics B

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Crossword for Acceleration

... about any point is equal to the sum of anticlockwise moments about that point. 5F Same as F5. 5O The abbreviation of the British unit of mass is lb. 6A & Newton’s first law states that a body remains in its state of rest or uniform motion unless 6M it is acted on by an unbalanced force, or a nonzero ...
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... Conservative Forces If the work done against a force does not depend on the path taken then that force is called a conservative force. Examples are gravity and spring force. The total mechanical energy (P.E. + K.E.) will remain constant in this case. If the work done against a force depends on the ...
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Work and Energy Study Guide

... Net Force = 65N-25N = 40N Work=Fxd Work=40Nx15m= 600 J 4. What is the spring constant for a spring that has 14J of potential energy when it is stretched 0.4m from its equilibrium position? PE=1/2kx2 14=1/2k(0.4)2 k=175N/m 5. A man carries a 60N bag of dog food down a 10m long hallway. How much work ...
PHY 2048 - University of Florida
PHY 2048 - University of Florida

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... 4) Deep in the forest, a 17.0g leaf falls from a tree and drops straight to the ground. If its initial height was 5.30m and its speed on landing was 1.3m/s, how much non-conservative work was done on the leaf? We will use conservation of energy. Initially the leaf has gravitational potential energy, ...
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lecture 15 momentum and impulse

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02-5-net-force-with

... Model the motion of a BASE jumper who falls from rest, if his total mass (with chute) is 100 kg and his drag constant is 0.31. Graph y vs. t and vy vs. t. What is the BASE jumper’s terminal speed and approximately how long does he fall until he reaches this speed? ...
AP Physics I
AP Physics I

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Modeling Collision force for carts Experiment 7

Newton`s Second Law Pages 46-48
Newton`s Second Law Pages 46-48

< 1 ... 373 374 375 376 377 378 379 380 381 ... 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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