2014 Winter Olympics and Physics

Louri Podladtchikov from Switzerland won won the gold medal of Sochi winter Olympics for halfpipe snowboarding.

Assume that the pipe has a radius of 15m and Louri reaches a maximum height of 3m above the edge of the halfpipe.
If Louri has a mass of 60kg, find:

i) Louri’s maximum speed,
ii)the amount of reaction force from the halfpipe at the time of maximum speed.

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