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Lecture09-09
... Path independence • If a force depends on POSITION only then the work done by it on an object moving from r1 to r2 will NOT depend upon the path. ...
... Path independence • If a force depends on POSITION only then the work done by it on an object moving from r1 to r2 will NOT depend upon the path. ...
Types of Forces - Southwest High School
... intermolecular forces between the molecules of the two different surfaces. As such, friction depends upon the nature of the two surfaces and upon the degree to which they are pressed together. The friction force can be calculated using the equation: Ffriction = µ x Fnorm where µ = coefficient of ...
... intermolecular forces between the molecules of the two different surfaces. As such, friction depends upon the nature of the two surfaces and upon the degree to which they are pressed together. The friction force can be calculated using the equation: Ffriction = µ x Fnorm where µ = coefficient of ...
Chapter 4 - Forces and Dynamics.
... You and a friend are sliding a large 100-kg box across the floor. Your friend pulls to the right with a force of 250N. The frictional force of the floor opposes the motion with a force of 500N. The box has an acceleration of 1.0m/s2 to the right. What is the force that you exert on the box? ...
... You and a friend are sliding a large 100-kg box across the floor. Your friend pulls to the right with a force of 250N. The frictional force of the floor opposes the motion with a force of 500N. The box has an acceleration of 1.0m/s2 to the right. What is the force that you exert on the box? ...
Short questions from past papers
... Explain why the moon does not have an atmosphere. [2006 OL] Because gravity is less on the moon. 11. A powerful rocket is required to leave the surface of the earth. A less powerful rocket is required to leave the surface of the moon. Explain why. [2008 OL] The force of gravity is less on moon so le ...
... Explain why the moon does not have an atmosphere. [2006 OL] Because gravity is less on the moon. 11. A powerful rocket is required to leave the surface of the earth. A less powerful rocket is required to leave the surface of the moon. Explain why. [2008 OL] The force of gravity is less on moon so le ...
Chazin NMR Lecture - Center for Structural Biology
... BASIC CONCEPTS OF NMR • How does NMR work? • Resonance assignment ...
... BASIC CONCEPTS OF NMR • How does NMR work? • Resonance assignment ...
TAP 522- 3: Rutherford scattering: directions of forces
... TAP 522- 3: Rutherford scattering: directions of forces Scattering of alpha particles Rutherford did not have a particle accelerator. Instead he used alpha particles, typically of energy 5 MeV, from radioactive decay. These questions are about the force of the nucleus on the alpha particle. An alpha ...
... TAP 522- 3: Rutherford scattering: directions of forces Scattering of alpha particles Rutherford did not have a particle accelerator. Instead he used alpha particles, typically of energy 5 MeV, from radioactive decay. These questions are about the force of the nucleus on the alpha particle. An alpha ...
1 An Engineer`s Guide to Quantized Angular Momentum The
... If space is isotropic (no electric or magnetic fields) then angular momentum states with the same j, but different jz have the same energy, i.e. j is (2j+1)-fold degenerate. When two angular momenta couple with each other the resultant depends on the orientation of the vectors. Since specifying the ...
... If space is isotropic (no electric or magnetic fields) then angular momentum states with the same j, but different jz have the same energy, i.e. j is (2j+1)-fold degenerate. When two angular momenta couple with each other the resultant depends on the orientation of the vectors. Since specifying the ...
Dependence of central force on angular velocity
... The yellow digital display at the lower left shows the theoretical central force based on the values entered for the car mass, radial distance from the rotational axis and the current measured angular velocity. This can be continuously compared to the current force displayed in the upper left of the ...
... The yellow digital display at the lower left shows the theoretical central force based on the values entered for the car mass, radial distance from the rotational axis and the current measured angular velocity. This can be continuously compared to the current force displayed in the upper left of the ...
Work and Simple Machines
... 2. How much work is done in pushing an object 7.0 m across a floor with a force of 50 N and then pushing it back to its original position? How much power is used if this work is done in 20 sec? Work = 7 m X 50 N X 2 = 700 N-m or J; Power = 700 N-m/20 sec = 35 W 3. Using a single fixed pulley, how he ...
... 2. How much work is done in pushing an object 7.0 m across a floor with a force of 50 N and then pushing it back to its original position? How much power is used if this work is done in 20 sec? Work = 7 m X 50 N X 2 = 700 N-m or J; Power = 700 N-m/20 sec = 35 W 3. Using a single fixed pulley, how he ...
Nuclear force
![](https://commons.wikimedia.org/wiki/Special:FilePath/ReidForce2.jpg?width=300)
The nuclear force (or nucleon–nucleon interaction or residual strong force) is the force between protons and neutrons, subatomic particles that are collectively called nucleons. The nuclear force is responsible for binding protons and neutrons into atomic nuclei. Neutrons and protons are affected by the nuclear force almost identically. Since protons have charge +1 e, they experience a Coulomb repulsion that tends to push them apart, but at short range the nuclear force is sufficiently attractive as to overcome the electromagnetic repulsive force. The mass of a nucleus is less than the sum total of the individual masses of the protons and neutrons which form it. The difference in mass between bound and unbound nucleons is known as the mass defect. Energy is released when nuclei break apart, and it is this energy that used in nuclear power and nuclear weapons.The nuclear force is powerfully attractive between nucleons at distances of about 1 femtometer (fm, or 1.0 × 10−15 metres) between their centers, but rapidly decreases to insignificance at distances beyond about 2.5 fm. At distances less than 0.7 fm, the nuclear force becomes repulsive. This repulsive component is responsible for the physical size of nuclei, since the nucleons can come no closer than the force allows. By comparison, the size of an atom, measured in angstroms (Å, or 1.0 × 10−10 m), is five orders of magnitude larger. The nuclear force is not simple, however, since it depends on the nucleon spins, has a tensor component, and may depend on the relative momentum of the nucleons.A quantitative description of the nuclear force relies on partially empirical equations that model the internucleon potential energies, or potentials. (Generally, forces within a system of particles can be more simply modeled by describing the system's potential energy; the negative gradient of a potential is equal to the vector force.) The constants for the equations are phenomenological, that is, determined by fitting the equations to experimental data. The internucleon potentials attempt to describe the properties of nucleon–nucleon interaction. Once determined, any given potential can be used in, e.g., the Schrödinger equation to determine the quantum mechanical properties of the nucleon system.The discovery of the neutron in 1932 revealed that atomic nuclei were made of protons and neutrons, held together by an attractive force. By 1935 the nuclear force was conceived to be transmitted by particles called mesons. This theoretical development included a description of the Yukawa potential, an early example of a nuclear potential. Mesons, predicted by theory, were discovered experimentally in 1947. By the 1970s, the quark model had been developed, which showed that the mesons and nucleons were composed of quarks and gluons. By this new model, the nuclear force, resulting from the exchange of mesons between neighboring nucleons, is a residual effect of the strong force.