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# Ch 11 Review Guide

Pressure The force exerted on a surface divided by the total area over which the force is exerted
Archimedes' Principle the rule that the buoyant force acting on a submerged is equal to the weight of the volume of fluid displaced by the object
Density The Ratio of the mass of a substance to its volume
Pascal (The Unit Measure) A unit of pressure equal to 1 newton per square meter
Fluid A material that can easily flow
Buoyant Force (Buoyancy) The upward force exerted by a fluid on a submerged object
4 Forces on airplanes Lift, Drag, Thrust, and weight
Pascals Principle The rule that when force is applied to a confined fluid, the change in pressure is transmitted equally to all parts of the fluid
Bernoulli's Principle the rule that the faster a fluid moves, the less pressure the fluid exerts
Hydraulic System (Definition, How it works) A hydraulic system multiplies force by applying the force to a small surface area. The increase in pressure is transmitted to another part of the confined fluid, which pushes on the larger surface area
How does pressure change with elevation? With Depth? The Deeper You got the more pressure there is from the water pressure above you
Unit of measure for mass Grams (g)
Unit of Measure for force Newtons (N)
Unit of measure for Pressure (there are three) Pascals (P), N/m2, kg/m
How does Lift Work? There's a difference at the bottom and top of the wing, the pressure above the wing has less pressure then the pressure below it making it lift
How do Density and buoyancy determine if an object sinks or floats? depending on the density of the object the object will sink or float if there's a light density buoyancy will lift it up
Unit of measure for area Centimeters (cm)
Unit of measure for volume Liter (l)
Density of Water one gram per milliliter
Unit of measure for density Mass (m)
Unit of Measure for Buoyancy Newtons (N)
Formula for Area Length x Width
Formula for Velocity Velocity = Distance/Time
Formula for Force (and weight) Force = m x a
Formula for Density d = m/v (Density = Mass/Volume)
Formula for Pressure Pressure = Force/ Area ( p = f/A)
Created by: rosedith