Forces Flashcards
What do forces change
The shape speed or motion direction of something
What is a force
A push pull twist or turn
What are forces measured using and what unit
Newtonmeter in newtons
What is mass
The amount of stuff (atoms, molecules) in a body
What is mass measured using and what unit
Kg or g using a digital balance
What is weight
The pull of gravity acting on a body
How do you calculate weight
Mass x gravitational pull (10)
What is friction
A force which opposes motion
When does friction act
When surfaces slide against each other
What force slows down aeroplanes
Air resistance
What shape reduces air resistance
Streamline
What does pressure tell us
How concentrated a force is
What does pressure depend on
Force and area
What kind of pressure is a big force pressing on a small area
High
What kind of pressure is a big weight spread out on a big area
Low
