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Force & Motion
Flash cards to help study the concepts of force and motion
18
Science
7th Grade
10/19/2009

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Term
acceleration
Definition
the rate at which the speed or direction changes
Term
force
Definition
push or pull acting upon an object
Term
momentum
Definition
the quantity of motion that an object possesses
Term
weight
Definition
the measurement of the gravitational force acting on an object
Term
friction
Definition
a force that resists the motion of an object
Term
unbalanced force
Definition
two forces of different strengths putting a force against each other
Term
Newton's First Law
Definition
an object at rest or in uniform motion in a straight line will remain at rest or in the same uniform motion unless acted upon by an unbalanced force
Term
speed
Definition
measurement of how fast an object is moving
Term
gravitational force
Definition
any two objects with mass attract each other with a type of force
Term
Newton's Second Law
Definition
the acceleration of an object is directly proportional to the total unbalanced force exerted on the object and is inversely proportional to the mass(as mass increases, the acceleration has to decrease)
Term
Newton's Third Law
Definition
if one object exerts a force on a second object, the second object exerts a force equal in magnitude and opposite in direction on the object body
Term
velocity
Definition
refers to the speed and direction in which an object moves
Term
potential energy
Definition
energy possessed by an object because of its height above the ground
Term
mass
Definition
measurement of the amount of material in a substance
Term
inertia
Definition
tendency of an object to resist change in its state of motion
Term
balanced force
Definition
whenever two or more forces act upon an object in such a way as to exactly counteract each other
Term
centripetal force
Definition
force that pushes an object in an inward direction (motion along a curve or through a circle is this type of force)
Term
kinetic energy
Definition
energy possessed by an object because of its motion
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