Chapter 11- Forces And Pressure Flashcards
What is pressure?
Is a measure of how much force acts on a given surface area measures in pascals
Pressure=
Force/ area
The smaller the area of the surface…
The higher the pressure and vice versa
Gravitational field strength is… (value)
9.8 N/kg
The greater the depth…
The greater the pressure
The greater the density…
The greater the pressure
The greater the gravitational field strength…
The greater the pressure
What are pascal’s vases?
Pressure depends on depth, not shaped container
Not all liquids have the same density (oil and water)
Pressure at the same depth, is the same
The greater the height, the greater the depth
The pressure of the atmosphere is due to…
… the collisions of the gas molecules with the surface area of the objects in it
Atmospheric pressure decreases the with the height because…
There are fewer particles, therefore less collisions therefore less force acting on the same surface therefore less pressure
Why do some objects sink, and then others float?
The objects float because the upthrust is three same as the weight, and they will sink because the weight is more than the upthrust
