Object is thrown up. How is it possible for it to have an acceleration when it has stopped moving at the top?

Object is thrown up in the air. How is it possible for it to have an acceleration when it has stopped moving at its highest point?Object is thrown up. How is it possible for it to have an acceleration when it has stopped moving at the top?
The acceleration is not zero if it is zero the object will not fall down, acceleration due to gravity is acting on the object even at the highest point.





The acceleration of the object (after it leaves the thrower's hand) is the acceleration due to gravity, g.1





The vertical velocity of the ball at its apex is zero.





The horizontal velocity is constant throughout the object's flight; it is whatever it was at the outset of its arc.2





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1. The acceleration due to gravity, g, is -9.8 m/s2 or -32.2 ft/s2.





2. Ignoring the effects of air resistance, which tend to slow things down.Object is thrown up. How is it possible for it to have an acceleration when it has stopped moving at the top?
Gravity is always affecting the ball at a constant 9.8 m/s虏 down towards the center of the earth.





For the sake of discussion, lets say that up is the positive direction, and down is the negative.





Now, when you throw the ball upwards with a certain velocity, you are accelerating it at more than |-9.8|m/s虏 upwards until you let go of the ball, at which point we can say that the velocity that you let go of the ball at is it's initial velocity in the positive direction. Gravity will be accelerating it at -9.8m/s虏, so it's velocity will lessen by 9.8m/s every second that it is the air. At that one point where the ball stops moving altogether, gravity has lowered the velocity to exactly zero. Since gravity is always affecting free-falling objects, the ball continues it's downward acceleration, so it's velocity starts to become negative, and therefore the ball will start moving downwards.





So, the ball had an acceleration of -9.8m/s虏 at all times when it was in the air, and that very highest point that it reaches and stops for an instant is the point at which the acceleration has negated the ball's initial upward velocity.





I hope that I helped.





Have a good day, and have fun in physics! ^_^
I think the confusion here may have arisen from a misunderstanding of what acceleration is. Acceleration is a measure of how much velocity is changing over time. It does not have anything to do with an object's current velocity.





Now, let's say you grab the ball and hold it the moment it reaches the height of its climb. Because the velocity of the ball has stopped changing (because your holding it in place), there is no acceleration. If you had not caught the ball, it would have maintained constant acceleration even though, for a split second, its velocity is zero. Why? Because its velocity is always changing.





I can't really think of any other way to explain it short of using mathematical arguments. I really hope this helps you gain a better understanding of acceleration.
when object is thrown up, it will have decelaration and when velocity reaches 0 then it stops in air and because of gravity it comes back to earth while coming back,its velocity increasesThis is only acceleration due to gravity