Forces Flashcards
Force
A push or pull
Newton
The strength of a force is measured in the SI unit called the newton
Net force
The combination of all forces on an object
Friction
When two surfaces rub against each other
Sliding friction
Friction between two solid surfaces that makes them slow down or stop
Static friction
Friction between two objects that aren’t moving
Fluid friction
Friction between a solid object and liquid object
Rolling friction
When a object rolls across a surface
Gravity
A force that pulls objects toward each other
Mass
A measure of the amount of which a object takes up
Weight
A measure of force or gravity on a object
Inertia
Resistance to change in motion
Momentum
A characteristic of a moving object that is related to mass and the velocity of an object
Law of conservation of momentum
In absence of outside forces like friction they total momentum of objects that interact does not change
Free fall
The motion of a falling object when only the force acting on it is gravity
