Friction Flashcards
What is friction
A force between two or more objects rubbing together
What kind of
Resistance does an object in water have
Water resistance
How do you reduce friction
Streamlined,lube,wax,oil
What is mass and what is it measured in
Amount of matter and measured in kg
What is weight and how is it measured
Force caused by gravity acting on a mass measured in newtons
What does more weight do to mass
More
Mass
What is force due to
Gravity on earth pulling on object
Is mass or weight fixed
Mass
How do you
Change weight
Gravity strength
What happens to speed when a parachute falls
Accelerates because of weight
What does air resistance do
Over
Time
Increases when parachute is opened
What does resistance do when parachute is opened
Increases and you
Slow down
What will happen after a while of having
Your parachute open
Become balanced and you have a new terminal velocity (air resistance equals weight)
What does friction do
Opposes the motion of an object it can also make something hot and wear it away
