What is acceleration? Expain in detail?
105355
the change in speed. you are walking at 6kms/hr but because you get tired, your speed became 4kms/hr. your acceleration is minus 2kms/hr. if you change your speed from 6kms/hr to 9kms/hr, then your acceleration is posituve 3kms/hr
1001657
V= V(i) + AT Initial velocity plus acceleratin x Time\n\n\n   = V(i) + (F/m)T     Acceleration = Force/ Mass\n\nNote  use same system of units
760918
Both these answers are missing the whole truth.\n\nAcceleration is a vector quantity, so it has a magnitude and a direction. The sign of a vector quantity indicates the direction that the vector is pointing.\n\nAcceration = dV/dT or change in velocity/change in time\n\n\n Positive acceleration means that the change in velocity over change in time is positive, so the object is accelerating away from you with an increasing velocity or the object is coming towards you and it's slowing down.\n\nNegative acceleration is the opposite. Either it's moving away and the change in velocity over change in time is negative (e.g. it's slowing down) or it's change in velocity over change in time is positive but it is accelerating toward you.
1133373
A newton is the amount of force required to accelerate a mass of one kilogram at a rate of one meter per sec per sec.\nDescription of Motion in One Dimension \nMotion is described in terms of displacement (x), time (t), velocity (v), and acceleration (a). Velocity is the rate of change of displacement and the acceleration is the rate of change of velocity. \n In order to derive new equations that can be used to describe the motion of an object in terms of its three kinematic variables: velocity, displacement, and time. There are three ways to pair them up: velocity-time, displacement-time, and velocity-displacement. In this order, they are also often called the first, second, and third equations of motion, but there is no compelling reason to learn these names. Since we are dealing with motion in a straight line, the symbol x will be used for displacement. Direction will be indicated by the sign (positive quantities point in +x direction, while negative quantities point in the -x direction). Determining which direction is positive and which negative is entirely arbitrary. The laws of physics are isotropic; that is, they are independent of the orientation of the coordinate system. As long as you are consistent, it doesn't matter. Some problems are easier to understand and solve, however, when one direction is chosen positive over another.\n\nvelocity-time\nThe relation between velocity and time is a simple one during constantly accelerated, straight-line motion. Constant acceleration implies a uniform rate of change in the velocity. The longer the acceleration, the greater the change in velocity. If after a time velocity increases by a certain amount, after twice that time it should increase by twice that amount. Change in velocity is directly proportional to time when acceleration is constant. If an object already started with a certain velocity, then its new velocity would be the old velocity plus this change. You ought to be able to see the equation in your mind's eye already.\n\nThis is the easiest of the three equations to derive formally. Start from the definition of acceleration, expand the Δv term, and solve for v as a function of t.\n\n          \na =  Δv  =  v − v0         \n  \nΔt Δt \n          \nv =  v0 + aΔt     (1) \n                  \n\nSince acceleration is also the first derivative of velocity with respect to time, this equation can also be derived using calculus. Just reverse the action of the definition. Instead of differentiating velocity to find acceleration, integrate acceleration to find velocity. Since acceleration is assumed constant, this is quite easy.\n\n          \n  a =  dv                     \n \ndt \n  dv =  a dt \nv   Δt     \n∫  dv =  ∫  a dt               \nv0   0     \nv − v0 =  aΔt  \n  v =  v0 + aΔt     (1) \n          \n\nThe symbol v0 (v nought) is called the initial velocity. It is often thought of as the "first velocity" but this is a rather naïve way to describe it. Take the case of a meteor hurtling towards the earth. What is its initial velocity? If you want v0 to be the first velocity, then the problem is over before it started. Who could possibly say what a meteor's velocity was at its birth? There is no way to answer this question. A better definition would be to say that an initial velocity is the velocity that a moving object has when it first becomes important in a problem. Say the meteor was spotted deep in space and the problem was to determine its trajectory, then the initial velocity would be the velocity at the time it was observed. But if the problem were to determine its velocity on impact, then it's initial velocity would more likely be the velocity it had when it entered the earth's atmosphere. In this case, the answer to, "What's the initial velocity?" is "It depends". This turns out to be the answer to a lot of questions.\n\nThe symbol v is then the velocity some time Δt after the initial velo
45821
are you sure that you want acceleration instead of velocity??\n\nwell, the acceleration is going to be 0.  since the speed is going to be the same the whole time, there won't be any acceleration.
414568
.75 seconds, and Acceleration
942941
Could you give me a detailed explanation ?
792058
you should visit the following link\nhttp://en.wikipedia.org/wiki/Centripetal_acceleration
929319
32 feet per second per second.  The acceleration is constant while the ball is in the air.  It is determined by the force of gravity.  The ball's speed will vary, but acceleration is constant.
915321
Inertia means 'laziness' to changes\n\nso obviously,\nresistance to change in velocity,\nthe tendency to maintain constant velocity,\na property of matter,\n\nAll three of these choices qualify as applicable.\n'resistance to acceleration', means force is going to act to oppose the external  force..not property of inertia. ..got it right?
312619
We have to find the resultant acceleration of acceleration in East direction and acceleration in the North direction, since there is change in direction.\n\nSince it moves with same speed in both directions it is enough if we find in any one direction.\n\nFor the first 2.5 s there is no acceleration, similarly there is no acceleration in the second 2.5 s. \n\nAt the end of first 2.5 s it has to come to stop and then turn to north all with zero time. \n\n In the Eastern direction the change in speed is 5- 0 = 5m/s. To find acceleration divide this by zero.  It is not defined. \n\nIf we assume that it takes a very small time, then the acceleration in this direction is nearly   minus infinity toward west (as the speed is reduced).\n\nSimilarly in the north direction it is plus infinity toward west.\n\nThe resultant of these two is inclined toward North West with a magnitude of infinity.
541091
Inertia means two things:\n\nAn object at rest will stay at rest, unless another force acts on it.\n\nAn object in motion will continue in motion, unless another force acts on it.\n\nAny force which changes the motion of an object -- the speed and/or direction -- is called acceleration.\n\n...You're riding along in your car.  Both you and the car have inertia; that is, you're both in motion, and will continue to move until something changes that.\n\nThe car runs into a wall, which certainly makes a big change in the car's motion.  You, on the other hand, and anything else inside the car that wasn't strapped down, will continue to move forward because of your own inertia.  Without a seat belt or air bag, your body will continue to move forward through the windshield, which is undignified, extremely painful, usually fatal, and a big drag to clean up.\n\nSo:\n\nA)  Seatbelts put you more "in contact" with the car; which is to say, any force which affects the inertia of the car will be more efficiently transferred to your body -- though not *so* efficiently that you go "splat" like the rest of the car; they just restrain you from continuing forward into the windshield.\n\nB)  A head rest acts as an accelerator for your head.  If the car accelerates suddenly (such as when somebody runs into the back of your car), the car's seat transfers that acceleration to your body.  The head rest acts as an extension of the seat, so that your head is also accelerated and doesn't get "left behind" because of its own inertia.\n\nC)  In practical terms, a force which is applied directly opposite to an object's direction of movement is called "deceleration."  It's still the same thing as acceleration, but we treat it as if the speed an object is going in a particular direction is being decreased in the same direction.  When the car hits the wall, as your body's inertia propels you forward, the air bag acts as resistance to that forward movement, decelerating the forward motion of your body.\n\nThe point to all three of these is to gently transfer acceleration to your body.  A car is much more rigid than your body (for instance, if you were to accelerate really hard, the rear bumper isn't going to get left behind), and is able to take much more drastic changes in its speed and direction.  Your body is much more fragile (and much more valuable) than a car, so seat belts, head rests and air bags are used to ease the changes in acceleration.\n\nAs you know, falling off a tall building isn't what kills you, it's the big fat splat at the bottom.  When you fall, your body accelerates down with a force of one G (which stands for earth's gravity), which your body can handle quite well.  But when you hit the ground, the ground acts to accelerate you in the opposite direction (up) *very* quickly, with much more acceleration than your body can stand.  If there's a big enough air bag to land on, it will slow down the up-acceleration (or down-deceleration, whichever way you look at it) to something that your body can handle.  Now, turn the whole setup sideways, and that's the reason for seatbelts, air bags and head rests.
466570
Mass.\n\nF=ma\n\nF is the force\nm is the mass\na is acceleration
256104
Read Newton's 3rd law of motion.\nAlso, use F=ma to figure out your acceleration.
137274
By definition, it's accelleration.
431787
Looks to be a subtle omission from the other posts about this.\n\nAcceleration is the rate of change of velocity with respect to time.\n\nThat is not insignificant. There can be relationships between numerous quantities in physics. One must specify which ones are dependet on the otehrs, otherwise a 'definition' is unclear and effectively useless.
1100415
1)Acceleration is the change in velocity (speed) per unit time\n\nVelocity = (meters/second)\nAcceleration = \n(meters/second) / second = meters/second-squared\n\nAcceleration = meters per seconds squared or D\n\n2)B\n\nFinal position = \n(initial position) + (initial velocity * time) + (-9.8/2 * time squared) / 2\n\nX is the height of the ledge\nInitial velocity is zero and so is final position:\n\n0[m] =  X[m]  + 0[m/s] - (4.9[m/sec sqrd] * 64[sec sqrd)\n\nX = 313.6 [m] or meters