9L Dam It Flashcards
Fluids include
Liquids and gases
Why can gases be compressed
Because they have spaces between their particles which they can move into .
What is the pressure of the air is due to
The weight of the particles above us
Pressure in water increases as you
You go deeper
What is a moment
The turning effect of a force
What are moments measured in
Newtons per metre (Nm)
How do we calculate the moment of a force
Force in Newton’s multiplied by distance from pivot
What does it mean when an object is in equilibrium
The forces acting on it are balance hence it is either stationary or at the same speed
This also means the clockwise and anti-clockwise moments are the same
Benefits of dams are
Produces clean hydroelectricity
Prevents damage caused y flooding further down the stream
Benefits of Water
Able to clean themselves Generates electricity Heating Washing And produce in food and drink
Losses and gains
Restricts wildlife
Costs a lot
Produces electricity and provide drinking water
Pressure formula
Force divided by area
The bigger the force
The bigger the pressure
The bigger the area the smaller
The pressure
High pressure can be useful
For getting a nail into the walls
