Concept Summary Batesville High School Science. Pressure  Pressure depends on:  The applied force - more force means more pressure  The area over which.

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Presentation transcript:

Concept Summary Batesville High School Science

Pressure  Pressure depends on:  The applied force - more force means more pressure  The area over which the force is applied - more area means less pressure  Force moves you - pressure determines how it feels.

Pressure  Pressure = force/area  Common units of pressure:  English system: lbs/in 2 (ppi)  Metric system: 1 Newton/m 2 = 1 Pascal  1 kiloPascal = 1000 Pascal

Liquid Pressure  The force a liquid exerts on the bottom of a container equals the weight of the liquid.  The pressure a liquid exerts on the bottom of a container depends only on the density of the liquid and the depth of the container.  Pressure = weight density x depth

Buoyant Force  Objects immersed in a liquid experience an upward buoyant force.  The buoyant force is due to the difference in pressure (and force) on the top and bottom of the object.

Archimedes’ Principle  The buoyant force on an object equals the weight of the liquid displaced (moved out of the way) by the object.

Sinking & Floating  If you put an object into a liquid, it:  Sinks if the object is more dense than the liquid.  Floats if the object is less dense than the liquid.  Neither sinks nor floats if the object has the same density as the liquid.

Principle of Flotation  A floating object displaces a weight of liquid equal to its own weight.

Pascal’s Principle  A change in pressure at any point in a confined liquid is transmitted undiminished to all points and all directions of the liquid.

The End 