Friction Flashcards
Define force
Strength or energy and an attribute of physical action or movement
Define contact force and give examples
A force that moves an object with
physical force
A foot to a ball
Turning a page
Pushing in a chair
Define the term field force and give examples
A force that can move an object without touching it
Magnet
Gravitational pull
Define the term newton
The unit for force
Describe the action of unbalanced and balanced forces
If the force is balanced the obviates won’t move but if it’s unbalanced, the stronger side will win moving the object
Define friction
A force that occurs when two objects rub together in opposite directions
Describe examples where friction is a benefit
It slows down and stop things from moving freely Without friction we couldn’t Walk Write Change a tyre
Describe examples where friction is a hindrance
When pushing a heavy object on a rough surface more force is required to push the object
Riding a bike in string wind-more force is needed to make the bike go forward
Define the term lubricant
A object of substance which reduces the force of friction.
List examples of solid lubricants
Graphite powder
Ball bearings
Examples of liquid lubricants
Oil
Grease
Vaseline
Factors that can increase the force of friction
The surface the object is moving over
The mass of the object
The shape of the object
Define balanced force
When the same amount of force is acting on each side of the object
Define friction
A force that occurs when two things rub together in opposite directions
Define unbalanced force
When the amount of force acting on the object is different on each side
