If the impact force to ensure an elastic collision is 1700 N, how much air drag force is needed to apply to each of the prototypes to decrease the net force to at least 1700 N? (Hint: Use Net Force)

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)