1. A lawn mower is pushed across a lawn by a force of 115 N along the direction of the handle, which is 23.0° above the horizontal. If 65.0 W of power is developed in 90.0 s, what distance was the mower pushed?

W = P x t

W = F d cos (angle)

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)