Force and Motion
... -Resistance forces are gravity and friction and to do work you have to overcome these Ex: Pushing on a wall IS NOT work; Carrying a box up stairs IS work; carrying a box down the hallway in your arms IS NOT work ...
... -Resistance forces are gravity and friction and to do work you have to overcome these Ex: Pushing on a wall IS NOT work; Carrying a box up stairs IS work; carrying a box down the hallway in your arms IS NOT work ...
Newton`s Laws - SCHOOLinSITES
... is moving through. An example is air resistance. When friction is present, an object may move with a constant velocity even when an outside force is applied to it. The friction force just balances the applied force so the net force is zero and no acceleration occurs. ...
... is moving through. An example is air resistance. When friction is present, an object may move with a constant velocity even when an outside force is applied to it. The friction force just balances the applied force so the net force is zero and no acceleration occurs. ...
Chapter 20 - Cloudfront.net
... myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.“ - Sir Isaac Newton - ...
... myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.“ - Sir Isaac Newton - ...
Managing Acceleration
... I’d rather be hit by an acorn than a big green pine cone going the same speed F = ma ...
... I’d rather be hit by an acorn than a big green pine cone going the same speed F = ma ...
Document
... scalar quantity). The weight of a body varies with its location near the Earth (or other astronomical body), whereas its mass is the same everywhere in the universe. The weight of a body is the force that causes it to be accelerated downward with the acceleration of gravity g. FG = mg ...
... scalar quantity). The weight of a body varies with its location near the Earth (or other astronomical body), whereas its mass is the same everywhere in the universe. The weight of a body is the force that causes it to be accelerated downward with the acceleration of gravity g. FG = mg ...
AP Physics C ID
... Ex. (This type of problem has been on a couple of AP MC exams) A man of mass m is standing at one of a floating stationary barge of mass 3m. He then walks to the other end of the barge, a distance of L meters. Ignore frictional effects between the barge and the water. a) How far will the barge move ...
... Ex. (This type of problem has been on a couple of AP MC exams) A man of mass m is standing at one of a floating stationary barge of mass 3m. He then walks to the other end of the barge, a distance of L meters. Ignore frictional effects between the barge and the water. a) How far will the barge move ...
Universe, Dark Energy and Dark Matter
... one lying within the volume seen in the photo but is distributed throughout a much bigger volume. Contrary to stars, this additional mass does not emit light, it is invisible but sets up a considerable gravity force, in addition to the stellar gravity force. Thus the term of “latent” masses (dark en ...
... one lying within the volume seen in the photo but is distributed throughout a much bigger volume. Contrary to stars, this additional mass does not emit light, it is invisible but sets up a considerable gravity force, in addition to the stellar gravity force. Thus the term of “latent” masses (dark en ...
ch04_LecturePPT
... Two blocks tied together by a string are being pulled across the table by a horizontal force. The blocks have frictional forces exerted on them by the table as shown. What is the net force acting on the entire two-block system? a) b) c) ...
... Two blocks tied together by a string are being pulled across the table by a horizontal force. The blocks have frictional forces exerted on them by the table as shown. What is the net force acting on the entire two-block system? a) b) c) ...
Practice Midterm
... (a) it is usually on the same side of the sun, relative to Earth. (b) its orbit around the sun is inside Earth’s orbit (c) its orbit around the sun is outside Earth’s orbit (d) it is usually on the opposite side of the sun, relative to Earth. (e) actually, the evening or morning star is usually Mars ...
... (a) it is usually on the same side of the sun, relative to Earth. (b) its orbit around the sun is inside Earth’s orbit (c) its orbit around the sun is outside Earth’s orbit (d) it is usually on the opposite side of the sun, relative to Earth. (e) actually, the evening or morning star is usually Mars ...
File
... Students’ responses should indicate that headrests are important for both front-end and rear-end collisions, however, the headrest is most important for rear-end collisions in which the vehicle moves forward as the person’s head tries to remain in place. In this case, the headrest helps to absorb so ...
... Students’ responses should indicate that headrests are important for both front-end and rear-end collisions, however, the headrest is most important for rear-end collisions in which the vehicle moves forward as the person’s head tries to remain in place. In this case, the headrest helps to absorb so ...
Physics Notes Ch 7 and 8 - Circular Motion, Equilibrium, and
... Gravity exerts a force on the center of gravity (CG) of an object. If the CG of the object is not over its base of support, the object will not be “supported” and it will topple or roll over. A torque is created by the lever arm distance between the point of support and the place where the weight ve ...
... Gravity exerts a force on the center of gravity (CG) of an object. If the CG of the object is not over its base of support, the object will not be “supported” and it will topple or roll over. A torque is created by the lever arm distance between the point of support and the place where the weight ve ...
lecture 17 slides
... Centripetal Acceleration • Centripetal refers to “center-seeking” • The direction of the velocity changes, the ...
... Centripetal Acceleration • Centripetal refers to “center-seeking” • The direction of the velocity changes, the ...
Chapter 1 Forces and Pressure
... EXTRA: A feather would fall as fast as an elephant IF there was no air resistance!!!! ...
... EXTRA: A feather would fall as fast as an elephant IF there was no air resistance!!!! ...
Modified Newtonian dynamics
In physics, modified Newtonian dynamics (MOND) is a theory that proposes a modification of Newton's laws to account for observed properties of galaxies. Created in 1983 by Israeli physicist Mordehai Milgrom, the theory's original motivation was to explain the fact that the velocities of stars in galaxies were observed to be larger than expected based on Newtonian mechanics. Milgrom noted that this discrepancy could be resolved if the gravitational force experienced by a star in the outer regions of a galaxy was proportional to the square of its centripetal acceleration (as opposed to the centripetal acceleration itself, as in Newton's Second Law), or alternatively if gravitational force came to vary inversely with radius (as opposed to the inverse square of the radius, as in Newton's Law of Gravity). In MOND, violation of Newton's Laws occurs at extremely small accelerations, characteristic of galaxies yet far below anything typically encountered in the Solar System or on Earth.MOND is an example of a class of theories known as modified gravity, and is an alternative to the hypothesis that the dynamics of galaxies are determined by massive, invisible dark matter halos. Since Milgrom's original proposal, MOND has successfully predicted a variety of galactic phenomena that are difficult to understand from a dark matter perspective. However, MOND and its generalisations do not adequately account for observed properties of galaxy clusters, and no satisfactory cosmological model has been constructed from the theory.