What is the magnitude of the force that is exerted on a 20 kg mass to give it an acceleration of 10.0 m/s2?

Need in all of themmm only answer if you know pls

If a simple machine reduces the strength of a force, what must be increased?

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)