Forces And Newtons Laws(1,2,3) Flashcards
Vector
A physical quantity that has both magnitude and direction
Scalar
A physical quantity that only has magnitude
Resultant vector
The single vector which has the same effect as all the original vectors acting together
Distance
Length of path travelled
Displacement
Change in position
Speed
Rate of change of distance
Velocity
Rate of change of displacement or rate of change of position
Acceleration
Rate of change of velocity
Inertia
The property of an object that causes it to resist a change in its state of rest or uniform motion
Weight
The gravitational force the earth exerts in any object on or near its surface
Normal force
The perpendicular force exerted by a surface on an object in contact with it
Frictional force
The force that opposes the motion of an object
Tension in a string/cable
The tension in a string/cable is the same throughout the entire string or cable
Newtons First law
An object continues in a state of rest or uniform velocity unless it is acted upon by a net or resultant force
Newton’s second law
When a net force, Fnet, is applied to an object of mass, m, it accelerates in the direction of the net force. The acceleration, a, is directly proportional to the net force and inversely proportional to the mass
