Newtons 1st Law Flashcards
(19 cards)
What is the law of inertia
An object will have constant motion unless there is an unbalanced force acting on it
Newtons first law is often called
Law of inertia
A force is
A push or a pull on an object
A force is …
A vector measurement (has both magnitude and direction )
Symbol for force
N
Unit for force
Newtons
Contact forces
Frictional Normal Applied Spring Tension
Action at a distance forces
Gravitational
Electrical
Magnetic
Gravitation force
Symbol?
Usually described as?
Unit
Formula
Symbol: Fg Force of gravity is usually described as objects WEIGHT Unit kg Formula Fg=m•g (g= gravitational pull 9.8N/kg)
Symbol for mass
Measures in what unit?
Symbol: m
Unit kg
Normal/support force
Symbol?
Symbol Fn
For an object at rest on a horizontal surface, the support force must equal the objects weight (Fg)
- force is perpendicular to a surface
Net force
Sum of all forces acting on a object Represented by (sum)F
Force vectors
A vector is an arrow that represents the magnitude and direction of a quantity
Stronger forces represented by longer arrow
A free body diagram
Is a diagram that shows all the forces acting on a object
- show the forces acting on a point source, with The forces pointing away from a object
Resultants
It’s the sum of two or more vectors
Same direction: add
Opposite: subtract
Mechanical equilibrium
A state wherein NO physical changes occur
- whenever the net force on an object is 0,
- mathematically expressed as (sum)F=0
- whenever the net force on an object is 0 object is in___
Known as____ rule
Mechanical equilibrium
Equilibrium rule
Static equilibrium
Objects at rest
Dynamic equilibrium
Object moving at a constant speed in a straight line path
