Pressure Flashcards
What is pressure
Force per unit area
How do you calculate pressure
Pressure = Force ÷ Area
What units is pressure measured in
Pascals
Give an example of high pressure
High heels
Give an example of low pressure
Snow shoes
What is a pivot
The point about which a lever or see-saw balances
What is a moment
A measure of the ability of a force to rotate an object around a pivot
How do you calculate a moment
Force × Distance from pivot
What units are moment’s measured in
Nm
What is the law of moments
An object is in equilibrium if the clockwise moments equal the anticlockwise moments
What is the centre of mass
The point in an object where all the mass seems to act
Give 2 examples of using moments
Opening a can of paint
Pedalling a bike
What 2 things can you change to increase the size of a moment
Increase the force
Increase the distance the force acts from the pivot
