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... If there is no net force acting on an object, the object will remain at rest or will keep moving at the same constant velocity. (Conversely, if an object is at rest or is moving at constant velocity, there is no net force acting upon it.) ...
Newton`s second law
Newton`s second law

Review - WordPress.com
Review - WordPress.com

Mechanical Equilibrium Questions/Answers PPT
Mechanical Equilibrium Questions/Answers PPT

... Net force is the combination (sum) of all acting forces. ...
W = mg W g = m = 1500 9.8 =153.06kg
W = mg W g = m = 1500 9.8 =153.06kg

Lecture2_Freefall
Lecture2_Freefall

... comes to a stop, and so its velocity is zero. However, since the ball is in free fall, its acceleration is g = 9.8 m/s2 (at every moment). ...
Circular Motion Centripetal Force MC
Circular Motion Centripetal Force MC

Physics 123/5 - UConn Physics
Physics 123/5 - UConn Physics

... 4.5 cm in a tree. Subsequent measurements showed that the tree would exert a stopping force of 70N on the straw. What was the straw’s speed when it hit the tree? Since the stopping force (70 N) is so much larger than the weight of the straw (0.0049 N), we may assume that the net work done is essenti ...
lectureslides09
lectureslides09

Force - springsphysics
Force - springsphysics

...  You only feel the forces exerted on you.  The forces must be equal, however the ...
Chapter 18: Fields and Forces
Chapter 18: Fields and Forces

... Propose a general explanation for how forces act over a distance. ...
L-6 – Newton`s Second Law Force is a vector quantity The NET
L-6 – Newton`s Second Law Force is a vector quantity The NET

... account both how strong the forces are and in what direction they act • The Net Force determines the acceleration of the object ...
4. acceleration and terminal velocity
4. acceleration and terminal velocity

Motion
Motion

... Newton's third law. The skaters' forces on each other are equal in magnitude, and in opposite directions ...
Work and Kinetic Energy - University of Utah Physics
Work and Kinetic Energy - University of Utah Physics

... Kinematics may be described in different coordinate systems. These systems may be in relative motion. Circular motion at constant linear speed is accelerated motion. Acceleration is towards center of circle. ...
The NET Force
The NET Force

The NET Force - University of Iowa Physics
The NET Force - University of Iowa Physics

Newton`s Third Law of Motion: Action and Reaction
Newton`s Third Law of Motion: Action and Reaction

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Document

How High Can You Jump On Mars?
How High Can You Jump On Mars?

Chapter 21 Temperature, Heat and Expansion
Chapter 21 Temperature, Heat and Expansion

POP4e: Ch. 1 Problems
POP4e: Ch. 1 Problems

Objective: Conservation of Energy I
Objective: Conservation of Energy I

... On the downward parts of the trip, the gravitational force does positive work, increasing the car’s kinetic energy and ultimately increasing its “speed”. Conversely, on the upward parts of the motion, the gravitational force does negative work, decreasing the car’s kinetic energy as well as decreas ...
Derivation of equations of motion
Derivation of equations of motion

Newton to Einstein Exercise 2 – Kinetics
Newton to Einstein Exercise 2 – Kinetics

... Check: (a) 0.8 nm is an atomic-scale separation, so we should not be surprised that some velocity has been lost – i.e. our answer is in the right ballpark, 0 < v < initial velocity. (b) 2.8  10–10m is 0.28 nm which is >0 and < the distance of part (a), so again in the right ballpark. (c) This is a ...
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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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