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Chapter-6 Work and Energy
Chapter-6 Work and Energy

... gymnast leaves the trampoline at a height of 1.20 m and reaches a maximum height of 4.80 m before falling back down. All heights are measured with respect to the ground. Ignoring air resistance, determine the initial speed v0 with which the gymnast leaves the trampoline. ...
momentum - SFSU Physics & Astronomy
momentum - SFSU Physics & Astronomy

Lecture 11 - Conservation of Momentum
Lecture 11 - Conservation of Momentum

Transparancies for Gravity & Circular Motion Section
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... “I frame no hypotheses; for whatever is not deduced from the phenomena is to be called a hypothesis; and hypotheses, whether metaphysical or physical, whether of occult qualities or mechanical, have no place in experimental philosophy.” October 2004 ...
Notes on Terminal Velocity and Simple Harmonic Motion – Physics C
Notes on Terminal Velocity and Simple Harmonic Motion – Physics C

... At t=0, the acceleration is g, since the velocity is zero. This can be confirmed using Newton’s Second Law, mg-kv=ma, and mg-0=ma so therefore a=g at t=0. After a long time, the acceleration of the object is zero. It is important to help the students learn to plug in these limiting values to determi ...
Satellite Motion
Satellite Motion

There are two forms of energy that we deal with on the planet earth
There are two forms of energy that we deal with on the planet earth

momentum
momentum

... • Big player @ 2m/s Small player @ 2 m/s • Big player @ 0.6 m/s Small player @ 6 m/s • Small player @ 2 m/s Bullet @ 100 m/s • Small player @ 100 m/s Bullet @ 4 m/s ...
Potential energy
Potential energy

... conservation of energy) states that energy can neither be created nor destroyed, just change form. When work is done on a system, the energy of that system changes from one form to another, but the total amount of energy remains the same. If only conservative forces do work on an object, mechanical ...
Mechanical Energy Conservation
Mechanical Energy Conservation

... 10. A baseball is thrown vertically upward with a velocity of 50 m/sec. How high will it rise? (Find your answer two different ways. First, use the equations of motion. Second, use the conservation of energy). 11. A 250 kg go cart is traveling at a constant velocity of 20 m/s on a flat road. It slow ...
Physics of Rocket Flight
Physics of Rocket Flight

ch2quizrev
ch2quizrev

... Which will require more force to accelerate an object at the same rate, a bowling ball or a golf ball? Explain why. A ...
Kinetic Energy
Kinetic Energy

... – Negative work is done on an object when the force opposes the forward motion of the object. The speed of the object decreases. – A student uses the brake on his roller blades to slow down. ...
chapter8_PC
chapter8_PC

... m1 = m2 – the particles exchange velocities When a very heavy particle collides head-on with a very light one initially at rest, the heavy particle continues in motion unaltered and the light particle rebounds with a speed of about twice the initial speed of the heavy particle When a very light part ...
Work, energy, springs
Work, energy, springs

Document
Document

... Tossing a ball – Gravitational Potential Energy From the above example, it looks as if the kinetic energy of the ball was transformed to another form of energy (with amount = mgh) as the ball was moving up. But on its way down, this energy (mgh) was released and transformed back to kinetic energy. W ...
Conservation of Energy 1 Purpose 2 Theory
Conservation of Energy 1 Purpose 2 Theory

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... Scientists have categorized the universe into two general categories: mass and energy. Mass provides inertia and takes up space. Energy is any resource that provides motion to mass. ENERGY Energy is present in the universe in a variety of forms including mechanical, chemical, electromagnetic, heat, ...
Thursday, Dec. 11th Thursday, Dec. 11th
Thursday, Dec. 11th Thursday, Dec. 11th

... average speed of rolling objects. DO NOW: Al and Zane both need to travel 1 mile to get to school. Both arrive at school in 15 mins. but traveled at different average speeds. How could this be? ...
Review for Test 2 Static Friction Static Friction Kinetic (or Dynamic
Review for Test 2 Static Friction Static Friction Kinetic (or Dynamic

Physics 225 Relativity and Math Applications Unit 5 E = mc
Physics 225 Relativity and Math Applications Unit 5 E = mc

... In fact, this is probably the most famous equation in all of physics.  It involves energy, and indeed, it’s time to turn our attention from space and time to the dynamical concepts of energy and momentum. As we will shortly discover, we must make some changes to Newtonian mechanics, so let’s remind ...
KINETIC ENERGY
KINETIC ENERGY

... from one object to another or changed from one form to another. ...
C_Energy Notes PGP
C_Energy Notes PGP

... Problem: How much work does an applied force do when it stretches a nonlinear spring where the force varies according to the expressions F = (300 N/m) x – (25 N/m2) x2 from its equilibrium length to 20 cm? ...
vandrlect
vandrlect

Ch4 Laws of Motion
Ch4 Laws of Motion

< 1 ... 354 355 356 357 358 359 360 361 362 ... 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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