First I was afraid
what could the answer be?
when skier's at the slope on give time,
what is his speed?
I spent so many times
thinking how I'd solve this one
To get it done -
I'd need his angle that point of run

I thought it back
what could it be
now when it's the height of x and
distance y when the time is at the t
Now I know that slope's a polynome
I might get that one solved really fine
If I had known for just one second
what is his tangential line!

And then I knew
what the answer 's due -
the speed is change now
there was just one more thing to do
Find the derivative of his position with respect to time.
Then I would it solve -
I would make it out just fine

Oh yes, now I -
I will derive
if I do like Newton and Leibniz did
I know I will do just fine
It's as easy as can be,
just have to find dx/dt.
so I'll derive
I will derive!
I will derive!

Now the desperation hit
at the second part:
if his speed is known at finish
and nil at the start
is there any point at run
where it's as fast as it can be
- its maximum
now where that can be seen?

And then I knew
at points like these
acceleration's zero, it won't
gather up more speed
And so I'd take the second order
derivative, I'd need
and resolve where it's zero
to find the maximum of speed

And then I knew
what the answer's due -
the speed-up's nil now
there was just one more thing to do
Find the derivative of velocity with respect to time.
Then I would it solve -
I would make it out just fine

Oh yes, now I -
I will derive
if I do like Newton and Leibniz did
I know I will do just fine
It's as easy as can be,
just have to find dv/dt.
so I'll derive
I will derive!
I will derive!