Chris, being an avid skier, takes a trip to an Alpine resort to ski. He skies down the slope, which could be approximated as a cubic path (y = x3/20, where x and y are in meters). When he reaches a point A along the path, he has a speed of 6 m/s which is increasing at 2 m/s2.
i) Determine his velocity and acceleration at this instant in en, et system.
ii) Express his velocity and acceleration in i, j system
iii) At the instant shown, find the values of r*, B*, r**, B** reported by the stationary observer at O.