# Shared Flashcard Set

## Details

Gravitation... etc.
Gravitation, Newton's Laws, Circualr Motion
13
Physics
01/07/2007

Term
 Force
Definition
 -a push or a pull -a physical quantity that can affect the motion of an object
Term
 vector quantities
Definition
 quantities that require magnitude, direction, and point of origin for thier descriptions
Term
 When no net force acts on a body, either ..a.. force acts on the body or the ..b.. of all forces acting on the body is ..c..
Definition
 a)no b)vector sum c)0
Term
 If there is no net force acting on a body, it will continue in a state of ..a.. or will continue moving along a(n) ..b.. line with ..c.. speed.
Definition
 a)rest b)straight c)constant/uniform
Term
 State the equation for the law of universal gravitation and explain each of the terms.
Definition
 F=(Gm1m2)/d^2 F is the force b-tween the objects G is the universal gravitaitonal # m1 & m2 are the masses d is distance between the 2 masses
Term
 If the masses of 2 objects are doubled, how is the force of gravitation affected?
Definition
 it's 4x as big
Term
 If the distance between their centers of mass is doubled, how is the force of gravitation affected?
Definition
 it's half as big
Term
 Gravitational field
Definition
 the area in which the gravity of an object is effetive
Term
 What force, in newtons, is required to accelerate a body having a mass of 30.0kg at the rate of 2.5m/s^2?
Definition
 75N
Term
 What are the two independant motions of a bullet fired from a gun?
Definition
 1)The bullet pushing against the gun 2)The gun pushing against the bullet
Term
 Why is centrifugal force a fiction?
Definition
 It is actually inertia acting against centripetal force.
Term
 Centripetal force
Definition
 the force producing acceleration involved in uniform circular motion
Term
 Centripetal force is need to keep a body in uniform motion because the body has ____.
Definition
 inertia
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