Physics-Forces Flashcards
What is a force? ?
A push, pull or twist vector.
Is a force a vector or a …?
Vector has magnitude and direction.
Define a contact force.
Force which is in direct contact with the object on which it acts.
Define a field force.
A force which is not in direct contact with the object on which it acts.
Define weight (W or Fg)
The force with which an object is attracted to the Earth.
Normal Force
The force which a surface exerts on an object in contact with it, and which is perpendicular to the surface.
Friction
The force that opposes the motion of an object, and which acts opposite to the surface of the object.
Tension
The pulling force transmitted by means of a rope,string,cable or chain.
Applied Force
Any force that is applied to an object by another object or person.
Force Diagram
A picture of the object of interest with all forces acting on it drawn as arrows.
Vector Diagram
Shows all the forces acting on an object drawn tail-to-head.
Free-body diagram
Represents the object of interest as a dot with all the forces acting on it drawn as arrows pointing away from the dot.
Define Static frictional force.
The force that opposes the tendency of motion of a stationary object relative to a surface.
The maximum force of static friction…
Is equal to the applied force when an object starts to move.
Define kinetic frictional force.
The force that opposes the motion of a moving object relative to a surface.
