What will be the terminal velocity of a cyclist moving downhill on a road with a grade of 57.8%? Assume the total mass of the cyclist and the cycle to be 90 kg, product of frontal area and drag coefficient, CDA = 0.51 m2 , density of air to be 1.2 kg/m3 , and the co-efficient of rolling friction to be FR =0.005. Find the distance taken to decelerate to half the terminal velocity while coasting after reaching level ground.