p11- forces and pressure
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14 Terms
what does pressure in a liquid increase with
depth
why does pressure increase with depth
as there is more force
formula for pressure in a liquid
pressure = height of a column x density of liquid x gravitational field strength
what is gravitational field strength measured in
N / kg
a liquid flows until
until the pressure along the same horizontal level is constant
what makes an object float
if the weight is less than the upthrust
when an object is floating what is the resultant force
0N
upthrust formula
force of pressure up - force of pressure down
what causes upthrust
the differences in pressure in a liquid
what is upthrust
the upward force a fluid exerts on a body floating in it
what affects whether an object floats or not
buoyancy, weight, shape, and fluid density
what is pressure
the force normal to a surface / area of the surface
what is one pascal
1N/m^3
what does the pressure at a point in fluid depend on
- density of the fluid
- depth of the fluid