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From Wiktionary under the GNU Free Documentation License. In physics, and more specifically kinematics, acceleration is the change in velocity over time. Because velocity is a vector, it can change in two ways: a change in magnitude and/or a change in direction. In one dimension, i.e. a line, acceleration is the rate at which something speeds up. However, as a vector quantity, acceleration is also the rate at which direction changes. Acceleration has the dimensions L T . In SI units, acceleration is measured in meters per second squared (m/s). In common speech, the term acceleration commonly is used for an increase in speed (the magnitude of velocity); a decrease in speed is called deceleration. In physics, a change in the direction of velocity also is an acceleration: for rotary motion, the change in direction of velocity results in centripetal (toward the center) acceleration; where as the rate of change of speed is a tangential acceleration. In classical mechanics, for a body with constant mass, the acceleration of the body is proportional to the resultant (total) force acting on it (Newton's second law): where F is the resultant force acting on the body, m is the mass of the body, and a is its acceleration. From Wikipedia under the
GNU Free Documentation License What is causing the universe to accelerate its expansion? Q. Until two years ago, physicists thought the universe expansion was slowing down. I understand that the expansion is accelerating. What "force" is acting to accelerate the expansion at this point? Asked by Skeptic - Mon Mar 30 20:35:08 2009 - - 12 Answers - 0 Comments A. I was just watching a show on it yesterday lol. Scientists and theorists call the evident outcome of this expansion the "big rip", in which the expansion overcomes the gravitational output of superclusters like our own milky way, because once there is no gravity holding everything together, it "rips". the "force" you were talking about is called "dark energy" or "phantom energy", and is referring to this acceleration of expansion. The only way the guy said he could explain it is if you quickly stretch a rubber band, and the hand that does not move is the center of the universe (not moving), but a you get closer to the hand that is stretching, the rubber band is moving faster. That represents the accelerating matter that is further away… [cont.] Answered by Evangeline - Mon Mar 30 20:44:36 2009 You accelerate from rest for 3 seconds while traveling a distance of 100m. What is your final velocity? Q. You accelerate from rest for 3 seconds while traveling a distance of 100m. What is your final velocity? I was wondering if you use this formula v2=u2+2as? Asked by Marisa - Sat Oct 18 20:06:23 2008 - - 3 Answers - 0 Comments A. I'm on a mission to teach people how to do exponents on a site like this. You mean: V^2 = U^2 + 2*a*s The ^ results form holding the shift and hitting 6. No, you wouldn't use that formula-- you don't know V or a. Choose one where you know all but one of the variables, like jgoulden did. Another way: since you assume the acceleration is uniform, the final speed will be 2X the average speed. The average speed is simple: Vave = 100 m / 3 s = 33.3 m/s Vf = Vave*2 = 66.6 m/s Answered by sojsail - Sat Oct 18 21:40:57 2008 When I accelerate through a turn, why is there a wiggling/vibration in my steering and suspension?
Q. I have a 2003 Ford Focus ZX5 that I just bought a few months ago, and I notice when I accelerate through a turn, the steering wheel jiggles and the whole car gently shakes. But when I'm taking a turn and not using the gas, it's smooth and normal. I also notice when braking hard from high speeds the steering wheel does the same jiggly thing, not to the point of losing control, but enough to get your attention. What's wrong with my car? Asked by Ian C - Mon Sep 3 13:29:53 2007 - - 4 Answers - 0 Comments A. That is called "torque steer" when you accelerate my friend. Your front tires are slipping and chopping, when you give it gas, while making the turn. That is why REAL race cars are rear wheel drive. The jiggly thing when you are on the brakes is from the warping of the rotor, you need to go have them trued, and replace the pads. Answered by 72OldsCutty - Mon Sep 3 13:38:11 2007 From Yahoo Answer Search: "accelerate"  news.google.com FOXNews The president invited dozens of CEOs and small business owners to Washington to hash out ideas for how to accelerate job growth, with unemployment hovering ... and more » news.google.com China Economic Net Since the Plan on Revitalizing Electronic Information Industry was implemented at the beginning of this year, domestic investment ... and more » news.google.com IntoMobile (blog) The acquisition of Trolltech will enable Nokia (NYSE: NOK) to accelerate its cross-platform software strategy for mobile devices and desktop applications, ... and more » From Google News Search: "accelerate"  two--plus--two.blogspot.com Added Entry Sun, 24 Jan 2010 15:21:00 GM 25 (AP) - (Kyodo) The government will . accelerate. its efforts to pick a relocation site for the U.S. Marine Corps' Futemma Air Station on the assumption that the victory of the anti-U.S. base candidate in the mayoral election in Nago, ...  cgw.com unknown Fri, 22 Jan 2010 08:00:00 GM Nvidia Collaborates with Weta to . Accelerate. Visual Effects for Avatar - CGW explores how leading-edge graphics techniques, including the 3D modeling, animation and visualization are used in such applications as CAD/CAM/CAE, architecture ...  philsblog.net Phil Miglioratti Fri, 22 Jan 2010 04:39:48 GM In a unique back-to-back setting, the National City Impact Roundtable Convergence and the Mission America Annual Gathering . Accelerate. 2010 are meeting in conjunction. We will be sharing three plenary sessions with speakers John ... From Google Blog Search: "accelerate" |
