Problem 3: Suppose a bicycle plus rider has a mass of 72.5 kg, and the gauge pressure in the tires is 3.25 X 105 Pa. Assuming bicycle tires are perfectly exible and support the weight of bicycle and rider by pressure alone, calculate the total area of the tires in contact with the ground, in square centimeters. - Problem 7: If the density of water is 1000 kg/m3 and the density of ice is 917 kg/m3 , What percentage of an ice cube will be oating above the water level