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#1 2007-09-26 06:42:10

Daniel123
Member
Registered: 2007-05-23
Posts: 663

vertical motion

Can anyone tell me where I'm going wrong?

A stone is dropped from the top of a tower. One second later another stone is thrown vertically downwards from the same point with a velocity of 14ms-¹. If they hit the ground together, find the height of the tower.

Quick response please!

Last edited by Daniel123 (2007-09-26 06:42:56)

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#2 2007-09-26 07:31:40

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: vertical motion

s = 14(t-1) + 4.905(t-1)², for thrown stone.

I like how you worked it through to the end even when you got a negative time. big_smile


Why did the vector cross the road?
It wanted to be normal.

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#3 2007-09-26 07:43:08

Daniel123
Member
Registered: 2007-05-23
Posts: 663

Re: vertical motion

I'm such an idiot.

Edit: Oops, forgot to say thanks smile

Last edited by Daniel123 (2007-09-26 09:04:36)

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