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So when the body moves up, acceleration= -g and the graph looks like what was drawn before for a decelerating body. Then when the body is moving downwards, acceleration= +g , now why does this graph have a curve similar to a decelerating body? Shouldn't the curve of this graph be in the opposite direction? How can I insert images here? It will be much easier to explain the question if I can upload images.

Asked by Deebu 20th March 2015, 1:36 PM
Answered by Expert
Answer:
Yes. You are right in saying that the curve should be on the other side of the x-axis.
However, we are drawing the curve considering ground as the origin. So, the displacement is w.r.t ground.
Hence, for top position displacement is maximum and it drops to zero when the body reaches ground level.
 
Now, if we draw only the graph of falling body w.r.t to top as the origin, then the displacement will be negative and the curve will be on the other side of the x-axis.
Answered by Expert 20th March 2015, 6:52 PM
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