Chapter 10 Study Guide Flashcards
force
a push or pull
newton
the SI unit for the magnitude, or strength, of a force
net force
the combination of all forces acting on an object
unbalanced forces
causes the velocity of an object to change
balanced forces
equal forces acting on one object in opposite directions
friction
a force that two surfaces exert on each other when they rub against each other
static friction
the friction that acts on objects that are not moving
sliding friction
when two solid surfaces slide over each other
rolling friction
when an object rolls across a surface
fluid friction
when a solid object moves through a fluid
gravity
a force that pulls an object towards each other
mass
the measure of the amount of matter in an object
weight
the gravitational force exerted on a person or object at the surface of a planet
free fall
when the only force acting on an object is gravity
air resistance
a type of fluid friction that acts on objects falling through air
