Newtons Laws Flashcards
Define weight(Fg)
Weight the the gravitational force the Earth exerts on any object on or near its surface.
Calculate weight like this: Fg=mg where g=9.8m/s^-2
Define normal force(N)
The normal force is the perpendicular force exerted by the surface on an object in contact with it
Define frictional force due to a surface
Frictional force due to a surface is the force that opposes the motion of an object and acts parallel to the surface with which the object is in contact
Maximum static friction formula
Maximum static friction= coefficient of static friction x normal force
(Solve problems where static frictional force is less than the maximum frictional force)
Free body diagrams
They’re drawn with the object as a dot and all the forces acting on it are drawn as arrows pointing away from the dot
State Newton’s first law
An object continues in a state of rest or uniform(moving with constant)velocity unless it is acted upon by a net or resultant force
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 a net force is applied to an object of mass it accelerates in the direction of the net force. The acceleration is directly proportional to the net force and inversely proportional to the mass
F = ma
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
The properties of action-reaction pairs
Equal in magnitude
Act in opposite directions
Act on different objects
Occur simultaneously
Act along the same line
