Definitions Flashcards
Vector
A physical quantity that has both magnitude and direction
Scalar quantity
A physical quantity that has magnitude only.
Resultant Vector
The single vector which has the same effect as the original vectors acting together.
Distance
The length of path travelled.
Displacement
A change in position.
Speed
The rate of change of distance.
Velocity
The rate of change of displacement.
Acceleration
The rate of change of velocity.
Weight
The gravitational force the Earth exerts on any object on or near its surface.
Gravitational field
The force acting per unit mass.
Normal force
The perpendicular force exerted by a surface on an object in contact with it.
Friction force due to a surface
The force that opposes the motion of an object and acts parallel to the surface with which the object is in contact with.
Friction
The force that opposes the motion of an object.
