Chapter Three Vocab Flashcards
a push or pull, or any action that involves the interaction of objects and has the ability to change motion
force
a quantity that describes the ability of an object to change or cause changes
energy
the English unit of force
pound
the force of gravity upon an object
weight
the metric unit of force
newton
a quantity with both a number measurement and a direction
vector
a pulling force that acts on a rope, string, or other object
tension
a “stretch” or increase in size
extension
a “squeeze” or decrease in size
compression
the amount of matter in an object
mass
anything that has mass and takes up space
matter
the basic SI unit of mass
kilogram
a unit of mass worth one thousandth of a kilogram
gram
a force that resists motion
friction
the friction force that resists the motion of an object moving across a surface
sliding friction
the friction force that resists the motion between two unmoving surfaces
static friction
the sum of all the forces acting on an object
net force
combined forces that result in a zero net force on an object
balanced forces
the state in which the net force on an object is zero
equilibrium
the perpendicular force that a surface exerts on an object that is pressing on it
normal force
a diagram showing all the forces acting upon an object
free-body diagram
