Activity 2: Let's Solve! Directions: Answer the following word problems by applying what you have learned in the lesson. Show your complete solution by following the G-R-E-S-A format. Problem 1. Pressure Say you're in your neighbor's pool, waiting near the bottom until your neighbors give up trying to chase you off and go back into the house. You're near the deep end of the pool, and using the handy pressure gauge you always carry, you measure the pressure on the back of your hand as 1.2 x 108 pascals. What force does the water exert on the back of your hand? The back of your hand has an area of about 8.4x10: square meters. Problem 2. Static pressure An airplane in level flight whose mass is 25,500 kg has a wing area of 68 ma. What is the pressure difference between the upper and lower surfaces of its wing? Express your answer in atmospheres. Problem 3. Pascal's Principle A hydraulic lift is supporting a car of mass 1 000 kg. If the cross-sectional area of the smaller chamber is 1 m- and that of the bigger chamber is 4 ma, what force can be applied on top of the movable piston on the smaller chamber to support the car at the bigger chamber? Problem 4. Archimedes' Principle What is the net force on a ball of mass 12.3 kg and volume of 0.25 m when it is submerged under water? The density of water is 1000- and the acceleration due to gravity is 10 . Note: Fast = Fo- F. (Approach - The buoyant force on the ball is simply the weight of water displaced by the ball.)