What is the acceleration when v=o m/s? Explain?

Answer 1

0(ZERO). And for the person velocity remains constant when a body is thrown up its not, v=-9.8 when it is going up till v=0 then a=0 when it is falling down a=+9.8

Answer 2

The trick to this question is understanding the difference between acceleration and velocity. Think of it like driving in a car. The velocity is the speed you are going. The acceleration is how hard you are pushing on the gas peddle. So acceleration is how much the velocity is changing, so the two do not have to be equal. For example, when you first get into your car, you push down on the gas peddle and then the car starts moving. At the very beginning, your speed (velocity) was zero, but your acceleration (how much you were changing velocity, was not zero.

Now to bring that to your question. Usually these questions are with a ball or something flying up and down. So, when the velocity is zero (at the very top for just a moment), the acceleration is just the acceleration due to gravity. It is going to start going down, so its change in velocity is that due to the effects of gravity.

Answer 3

It could be anything. If it's just sitting there, the acceleration is 0 m/s^2. But, if it's in the process of moving (and at this particular instant is stationary), then the acceleration could be anything.

Imagine if you're in a car going reverse. You slow down and pop it into drive, and start moving forward. For one instant, right between reverse and forward, your velocity was 0. However, you were in the process of changing directions, so your acceleration was positive throughout that entire time.

Answer 4

It could be anything. Imagine that you throw a ball straight up; before it comes back down there will be a moment when the balls velocity is 0--even though the acceleration is constant throughout the trip.

Answer 5

Acceleration is defined as how fast the velocity is changing. Velocity has units of distance per time (e.g., mile per hour, meters per second). Velocity is how fast your position changes over time. Acceleration has units of velocity per time (e.g., (miles per hour) per hour, (meters per second) per second). Mathmatically, (meters per second) per second is identical to meters/second^2.

You can easily imagine driving past some milepost along the road at 60 mph. When you pass the milepost, you are at a position of zero but a velocity of 60 mph. The same is true of acceleration, you can be at a velocity of zero but still have any arbitrary acceleration. Imagine a rocket sled (a little weird but stick with me) going at high speed and you fire some braking rockets to slow you down. If the rockets put out a constant thrust, you are experiencing constant acceleration regardless of speed. With the braking rockets burning you go slower and slower. If you leave the rockets on, you will come to a complete stop (zero velocity) and then start going backwards. All the time your acceleration is determined by the rockets and at one point you did have zero velocity.

Answer 6

V=u+at