Forces Flashcards
Vector quantity
A quantity that has both magnitude and direction.
Scalar quantity
A quantity that has magnitude with no direction.
Displacement
A vector quantity representing a change in position.
Velocity
Rate of change of displacement of an object.
Balanced forces
Two forces acting in opposite directions of an object and equal in size.
Unbalanced forces
Forces that cause a change in motion of an object.
Newtons first law
Object stays in motion or at rest unless an external force acts upon it.
Newtons second law
The acceleration of an object is in the direction of the external force.
Newtons third law
Forces always occur in equal and opposite pairs.
Dynamic friction
Friction between surfaces in motion.
Static friction
Friction between surfaces that are stationary.
Rolling friction
Friction between
Terminal velocity
The speed of a falling object at when it reaches constant.
