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presentation source - Doane College Physics Web Server
presentation source - Doane College Physics Web Server

chapter12
chapter12

... Equilibrium implies that the object moves with both constant velocity and constant angular velocity relative to an observer in an inertial reference frame. We will deal now with the special case in which both of these velocities are equal to zero  This is called static equilibrium. ...
3.3 Forces Adv B 2 MODIFIED
3.3 Forces Adv B 2 MODIFIED

... The acceleration’s direction is NOT always the same as the direction of it’s velocity. The acceleration is in the direction of the net force on a body. F = ma = W= mg ...
Lesson 1: Newton`s First Law of Motion
Lesson 1: Newton`s First Law of Motion

Momentum
Momentum

... and how fast the vehicle is traveling to tell us a time it will take to stop. Then we can find the distance using one of our linear kinematic equations. A change in momentum over a longer time requires less force. ...
PS3F16 solutions final
PS3F16 solutions final

Section 1: Measuring Motion
Section 1: Measuring Motion

...  Negative acceleration – negative number with a negative slope on a velocity-time graph  Constant velocity – zero slope – flat line ...
СОДЕРЖАНИЕ Введение
СОДЕРЖАНИЕ Введение

... object is a product of two parts: its mass and its velocity. Thus Newton’s Second Law may be written mathematically in this way: d F  mv  dt ...
Uniform Circular Motion
Uniform Circular Motion

PROBLEMS
PROBLEMS

Document
Document

... 5.5.1. A satellite is in a circular orbit around the Earth. If it is at an altitude equal to twice the radius of the Earth, 2RE, how does its speed v relate to the Earth's radius RE, and the magnitude g of the acceleration due to gravity on the Earth's surface? a) v  1 ...
Engineering Science - Mechanics  Statics – Course Content
Engineering Science - Mechanics Statics – Course Content

Chapter 11
Chapter 11

Chapter 11 - Buckeye Valley
Chapter 11 - Buckeye Valley

... In some cases, an applied force is balanced by an opposite force, and there is no change in motion. In other cases, an applied force is not balanced by an opposite force, and the result is acceleration in the direction of the applied force. Look at the following illustrations, and identify the force ...
File
File

Slide 1
Slide 1

Lessons 45-47
Lessons 45-47

... which runs parallel to the ramp and over a pulley at the top of the ramp. After passing over the pulley the other end of the rope is attached to a counterweight which hangs straight down. In your design the mass of the counterweight is always adjusted to be twice the mass of the package. Your boss i ...
physics b
physics b

Name
Name

... Which force will change? Which force remains the same? If the upwards acceleration is 3 m/s2, then what is the magnitude of each force? ...
Chapter 9 - Churchill High School
Chapter 9 - Churchill High School

... cylindrically walled “room.” The room radius is 4.6 m, and the rotation frequency is 0.50 revolutions per second when the floor drops out. (a) What is the minimum coefficient of static friction so that the people will not slip down? (b) People on this ride say they were “pressed against the wall.” I ...
AP Physics Chapter 8.1 Notes
AP Physics Chapter 8.1 Notes

... The Second condition for Equilibrium: if an object is in rotational equilibrium, the net torque on it about any axis must be zero. ∑τ = 0. Now we know that a body/object in static equilibrium must satisfy two conditions: 1. The resultant external force must equal zero. ∑Fnet = 0 2. The resultant to ...
Lecture3
Lecture3

The Double Helix Theory of the Magnetic Field
The Double Helix Theory of the Magnetic Field

Moment Of A Force
Moment Of A Force

... often called the “moment arm”. Mo is the tendency for F to “twist” the axis through point o. • In 2-D, the direction of MO is either clockwise or counter-clockwise depending on the tendency for rotation. • Mo has units of (force-length); e.g. ft-lb, N-m. • “Moment” and “torque” are used synonymously ...
Minerals and Earth Layers - Department of Earth and Planetary
Minerals and Earth Layers - Department of Earth and Planetary

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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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