Forces Flashcards
What can the equation of force be written as?
F
P= _ = Newtons/metre2 or Pascals
A
Show the pressure triangle
/ \
/ F \
/— \
/P x A\
What is biomass?
Any mass that comes from a living thing
How do you test for oxygen?
A glowing wooden splint relights in a test tube of oxygen
How do you test for carbon dioxide?
A lit wooden splint goes out in a test tube of oxygen
Bubble gas through a limewater {calcium hydroxide solution} If it’s carbon dioxide the limewater will turn cloudy white
How do you test for starch?
Starch turns red to black when tested with Iodene solution
What is a hydraulic system?
In a hydraulic system you transmit a force from one point to another via an incompressible liquid
What can we do using a hydraulic system?
Using a hydraulic system you can increase a force applied to a particularly area
What happens when gases are compressed?
When gases are compressed the particles bump against each other and so the pressure rises
Where does pressure come from?
Pressure comes from particles bumping against other particles. Air pressure comes from gas particles bumping against things like trees or buildings, even people
If you’re higher up in the atmosphere what happens to the air pressure and why?
The higher up in the atmosphere the lower the air pressure because there isn’t anything for the gas particles to bounce off to create air pressure
What is a lever and what does it do?
A lever is a rigid bar resting on a pivot used to move a heavy or firmly fixed load with one end when pressure is applied to the other
Give four examples of a lever
Scissors Doors Light switches Windows Wheel barrow Cranes
What is a turning force?
A turning force is described as a force multiplied by the distance the force is away from the point of turning {pivot} it must be at right angles
What is the proper name for the turning point
The pivot
