pressure Flashcards
1
Q
changes in pressure on an object
A
amount of force applied on a unit area
2
Q
what affects pressure
A
weight & surface area
3
Q
weight
A
more weight = more pressure
less weight = less pressure
4
Q
surface area
A
more SA = less pressure
less SA = more pressure
5
Q
pin vs nail
A
pin -> small SA, more pressure, easier to push into wall
nail-> big SA, less pressure, harder to push into wall
6
Q
pressure formula
A
pressure=force/area
7
Q
pressure in liquids
A
- as u go deeper underwater, higher pressure acting on your body
- walls of dam are thick so they don’t break easily due to the water pressure
8
Q
atmospheric pressure
A
1.earth is surrounded by a thick layer of air, air particles are light, have mass & occupy space. layer of air particles pushes down on Earth’s surface due to gravitational force
2. height above sea level -> lesser atmospheric pressure
