Download Study Guide Part 2

Study Guide Part 2
Newton’s Laws of Motion
Newton’s First Law
 ____ is a push or pull on
an object
 The combination of all
the forces acting on an
object is the ___ force.
 When forces are ___
forces, they cancel each
other out and do not
change an object’s
motion.
Balanced
Net
Force
 When forces are ___
forces, the motion of
an object changes.
 ___ states an object
will remain at rest or
move with constant
speed unless a force
is applied.
 Newton’s First Law
of Motion
 Unbalanced
____: a force that resists sliding between two
touching surfaces or through air or water.
 Friction ___ an object’s
motion.
 ____ friction– the type of
friction that prevents an object
from moving when a force is
applied.
 ____ friction is due to the
microscopic roughness of two
surfaces; it slows down a
sliding object.
 __ friction between the
ground and a wheel allows
the wheel to roll.





Rolling
Friction
Static
Slows down
Sliding
Newton’s Second Law
 Newton’s second law of motion connects
force, acceleration, and mass; it explains
that an object acted upon by a force will
accelerate in the direction of the force;
acceleration equals net force divided by
mass.
 ___ attractive force
between two objects;
depends on the mass of
the objects and distance
between them.
 Gravitational force is
also called ___.
 In circular motion, the
___ force is always
perpendicular to the
motion.
 Weight
 Gravity
 Centripetal
 The second law
explains how to ___
the acceleration of
an object if its mass
and the forces acting
on it are both known.
 The ___ is reached
when the force of
gravity is balanced
by air resistance.
 Terminal velocity
 Calculate
 An object can speed
up, slow down, or
turn in the direction
of the net force when
___ forces act on it.
 The size of air
resistance force
depends on ___of an
object and its ___.
 Speed
 Unbalanced
 Shape
Newton’s Third Law
 Newton’s Third Law states that forces
always act in equal but opposite pairs; for
every action there is an equal and
opposite reaction.
 Action-reaction forces
are always the same
size but are in __
directions and act on
different objects.
 When the mass of one
object is considerably
___ than the mass of
another object, the
action-reaction force is
not noticeable.
 Large
 Opposite
 ___ and ___ exert
action-reaction
forces with objects
such as hands or
canoe paddles.
 A ___ launches due
to the equal but
opposite forces of
the burning fuel.
 Rocket
 Air
 Water