# Shared Flashcard Set

## Details

Force and Motion
Newton's Laws
29
Science
04/01/2008

Term
 inertia
Definition
 Tendency of objects to remain in motion or stay at rest.
Term
Definition
 Forces in the same direction combine by ____.
Term
 Wt. = m x g
Definition
 Formula for weight.
Term
 unbalanced forces
Definition
 Forces on the same object that are not opposite or equal.  They change motion.
Term
 Newton
Definition
 Metric unit of force or weight
Term
 Projectile
Definition
 An object thrown or shot into the air.
Term
 Newton's 3rd Law
Definition
 For every action there is an equal and opposite reaction.
Term
 mass
Definition
 The amount of matter in an object.
Term
 Isaac Newton
Definition
 Who showed that the force that pulls an apple to the ground is the same force that keeps the moon in orbit around the earth.
Term
 subtraction
Definition
 Forces in opposite directions combine by ____.
Term
 9.8 m/s2
Definition
 On earth acceleration of a falling object due to gravity is _______.
Term
 Weight
Definition
 A measure of the force of gravity on an object.
Term
 balanced forces
Definition
 Forces on the same object that are opposite in direction and equal in size.
Term
 orbital motion
Definition
 An objects motion when its forward inertia equals the pull of gravity downward.
Term
 lubricants
Definition
 slippery substances that change sliding friction to fluid friction.
Term
 rolling friction
Definition
 Type of friction of a car driving down the road.
Term
 air resistance
Definition
 The reason a feather and a rock dropped at the same time and from the same height don't hit the ground at the same time.
Term
 Newton's Law of Universal Gravitation
Definition
 All objects in the universe attract each other by the force of gravity.
Term
 weight
Definition
 A change in the pull of gravity on you would result in a change in your______.
Term
 Force
Definition
 A push or a pull.
Term
 mass
Definition
 The size of the force of gravity between two objects depends on the distance between them and the object's________.
Term
 Newton's 2nd Law
Definition
 Force=mass x Acceleration
Term
 Newton's 1st Law
Definition
 An object at rest will remain at rest, and an object in motion will remain in motion, unless acted upon by unbalanced force
Term
 Friction
Definition
 A force that opposes motion
Term
 gravity
Definition
 Attractive force between all objects in the universe.
Term
 curve
Definition
 The motion of any projectile usually ends in a downward_____.
Term
 Fluid friction
Definition
 Type of friction when an object moves through air or water.
Term
 terminal velocity
Definition
 When a falling body no longer accelerates because the force of air resistance upwar equals the pull of gravity downward.
Term
 Newton's 3rd Law
Definition
 For every action there is an equal and opposite reaction
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