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# M1 speed time graph watch

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1. (Original post by Zacken)
Ball is fired from a height of 2.5 metres, i.e: it starts from 2.5 metres.

Ball starts falling, picks up speed, it is at the same speed as it was intially launched at when it is 2.5 metres above ground, but it has another 2.5 metres to travel before it hits the ground so it picks up more speed in that time.
Hi, so if the ball only has to travel 2.5m downward would this mean the speed will be equal to the inital speed (14ms-1)?

So the longer the distance, the greater speed?
Thanks.
2. (Original post by coconut64)
Hi, so if the ball only has to travel 2.5m downward would this mean the speed will be equal to the inital speed (14ms-1)?

So the longer the distance, the greater speed?
Thanks.
I don't understand what you're saying.

The ball is fired from a height of 2.5 metres (imagine it is on a table 2.5 metres from the ground) at 24 metres per second.

It flies up, hits its maximum height then heads back downwards. It picks up speed as it falls downwards and when it is as table-level it is at 24 metres per second again, but it still has the extra distance to go from the table to the ground and it picks up speed whilst falling from table-level to ground-level, so it hits the ground at a speed greater than 24 metres per second.
3. (Original post by Zacken)
I don't understand what you're saying.

The ball is fired from a height of 2.5 metres (imagine it is on a table 2.5 metres from the ground) at 24 metres per second.

It flies up, hits its maximum height then heads back downwards. It picks up speed as it falls downwards and when it is as table-level it is at 24 metres per second again, but it still has the extra distance to go from the table to the ground and it picks up speed whilst falling from table-level to ground-level, so it hits the ground at a speed greater than 24 metres per second.
That answers my question. I thought it was 14 ms-1 not 24 sorry. I was asking will the speed be greater if it has more distance to travel which u said it will. And at first i was asking whether the speed of the ball will be the same as the inital speed (24ms-1) if it accelerates downward and returned to the original position instead of hitting the ground. Thanks.

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Updated: March 29, 2016
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