A person in a kayak starts paddling, and it accelerates from 0 to 0.614 m/s in a distance of 0.372 m. If the combined mass of the person and the kayak is 61.0 kg, what is the magnitude of the net force acting on the kayak?
a = v^2/(2s) = 0.614/0.744 = 0.8263 m/s^2
F = ma = 61.0*0.8263 = 50.34N