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#1 lanky_182

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Posted 18 May 2005 - 12:48 PM

The question asks how does the value of the kinetic energy of the coin when it enters the dish compare with the kinetic energy of the coin just as it leaves the contestants hand?

there is no mention of the mass of the coin in the question... how can u work out the kinetic energy / potential energy when there is no mass??



#2 broughy

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Posted 18 May 2005 - 01:49 PM

a complete guess, cos i don't have the question, but possibly something to do with the mass being constant? like i said, i really don't know though cos i don't know the question!!
when i'm dancin' with you,
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turn that music up,
till the windows start to shatter,
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& i can't even dance

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#3 Dave

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Posted 18 May 2005 - 02:08 PM

you are not being asked to give a value simply to say what happens

In the contestants hand the coin has to ascend to reach the dish. The coin then fals into the dish so the kinetic enrgy will be greater here than in leaving the hand of the contestant. Hence allt he potential energy is turned to kinetic as it enters the dish

something along though lines i think

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#4 werlop

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Posted 18 May 2005 - 03:07 PM

Yeh, during motion Ep is converted into Ek.
Click here to visit the Bearsden Academy Website
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If you can keep your head when all about you
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you
But make allowance for their doubting too,
If you can wait and not be tired by waiting,
Or being lied about, don't deal in lies,
Or being hated, don't give way to hating,
And yet don't look too good, nor talk too wise:
Yours is the Earth and everything that's in it,
And--which is more--you'll be a Man, my son!





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