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**Apex** Thanks...I kept getting something like 13.06(my way). The solution in the paper returns the same answer as you, but it is done like this:

s=ut + 0.5at^2

and

s= ?

u= 16

v= -

a= -9.8

t= 4

What I don't understand, is why if it's done this way (using these values), it actually gives the value of h, as oppose to the distance* from *h, to where v=0, and then to the ground. i.e., the whole journey of the rock minus the distance h.

Can you please explain how this method works?

Thanks

Apex