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Science - Chapter 11
Forces in Fluid
| Question | Answer |
|---|---|
| Pressure | a force that is exerted over an area on the surface of an object |
| Pressure Formula | Force / Area |
| Pascal | a unit of pressure; N/m^2=Pa |
| Fluid | a material that can flow easily |
| Buoyant Force | acts in the direction opposite to the force of gravity.... because of this it makes an object feel lighter |
| Archimedes' Principle | the buoyant force acting on a submerged object is equal to the weight of the fluid the object displaces |
| Density | a substance is its mass per unit volume; mass / Volume |
| Pascal's Principle | when force is applied to a confined fluid, the change in pressure is transmitted equally to all parts of the fluid |
| Hydraulic System | multiples force by applying the force to a small surface area |
| Bernoulli's Principle | the speed of a moving fluid increases the pressure with the fluid decreases |
| lift | an upward force |