18 terms

# Conceptual Physics-Chapter 2: Newton's First Law of Motion--Inertia

Conceptual Physics 10th e. by Paul G. Hewitt Summary of Terms, Summary of Formulas, and Terms Within the Textbook

#### Terms in this set (...)

Force
any push or pull of an object; a vector quantity measured in newtons. Unbalanced force changes an object's motion.
Net Force
The vector sum of all forces that act on an object.
Vector
An arrow whose length represents the magnitude of a quantity and whose direction represents the direction of the quantity.
Vector Quantity
any quantity that has both magnitude and direction. (force, acceleration, velocity)
Scalar Quantity
any quantity that is described only by magnitude, not direction. (mass, volume, time)
Mechanical Equilibrium
when the net force on something is zero. (A state where no physical changes occurs.)
Equilibrium Rule
For any body in mechanical equilibrium, the vector sum of the forces on it are zero- that is, ∑F=0.
Support Force
Force that completely balances the weight of an object at rest.
Tension
Is the upward force action on a suspended object. (Stretching force).
Weight
Is the downward force caused by gravitational pull.
Static Equilibrium
Objects at rest.
Dynamic Equilibrium
Objects moving at constant speed in a straight-line path.
Inertia
Property of things to resist changes in motion
Newton's First law of motion
Every object stays at rest unless or in speed of a straight line unless acted by another object.
natural motion
proceeds from nature using the 5 elements
((Aristotle))
violent motion
pushing or pulling forces
((Aristotle))
resultant
the sum (net result) of 2 or more vectors
equilibrium
state of no change