Subject: Calculate power required to deliver a curling stone

I work with wheelchair curlers, who deliver the stone using only a 'shot stick'
with which they essentially push the stone, from a seated position, to send it
on its way down the ice. There is no sweeping in wheelchair curling so the
delivery is the only factor that influences where the stone ends up.

I am trying to work out the forces (ultimately power) associated with delivering
 the stone. I think this is very similar to questions posed here on 'how to
calculate horsepower from acceleration and weight', but as it was a long time
since I did Physics at school I'm struggling a bit with the calculations.

The things I know already or that can easily be measured:

The weight of the stone (19.96kg)

The speed of the stone for the first few seconds (2 or 3 seconds) following
delivery (ranges between 2 and 3 meters per second)

The friction coefficient of curling ice has been reported to be ľk = 0.0168
although I'm not sure how valid this is as I can only find a web reference and
not the research paper (Babcock, David D. The Coefficient of Kinetic Friction
for Curling Ice. 8 April 1996.)

The regulation size of the stones is 91.4 cm (36 in) in circumference, and 11.4
cm (4 1/2 in) in height. Although I suspect drag is not going to be too relevant?

I'm sure that with this information I should be able to work out force and
therefore ultimately power.

Many thanks!

Re: Calculate power required to deliver a curling stone