Physics Deffinitions Flashcards
Define weight (Fg)
The gravitational force that the earth exerts on any object on or near its surface
Normal force (Fg)
The perpendicular force exerted by a surface on an object in contact with it
Define frictional force (Ff)
The force that opposes the motion of an object
State Newton’s first law
An object continues in a state of rest or uniform velocity unless it’s acted on by a net or resultantforce
Define inertia
The property of an object that causes it to resist a change in its state of rest or uniform motion
State Newton’s second law
When the net force (Fnet) is applied to an object of mass, is accelerates in the direction of the net force. The acceleration is directly proportional to the to the net force and inversely proportional to the mass.
State Newton’s third law.
When object-A exerts a force on object-B, object-B simultaneously exerts an oppositely directed force of equal magnitude on object-A
Define a vector.
A physical quantity that has both direction and magnitude.
Define scalar
A physical quantity that has magnitude only
Define a resultant vector.
A single vector which has the same effect as the original vectors acting together.
Define distance.
The length of path travelled
Define displacement.
A change in position.
Define speed
The rate of change of distance
Define velocity
The rate of change of position.
Define acceleration
The rate of change of velocity
