# Shared Flashcard Set

## Details

Chapter 5 Test
Newton's laws
13
Science
04/14/2012

Term
 Force
Definition
 A push or pull
Term
 Net Force
Definition
 The sum of two or more forces on an object.
Term
 Unbalanced Forces
Definition
 Result in a net force on an object that can cause changes in motion.
Term
 Interia
Definition
 The property of an object that resists changes in it's motion
Term
 Speed
Definition
 The distance an object travels divided by the time it takes.  s= d/t
Term
 Velocity
Definition
 A variable that tells both speed and direction
Term
 What is the difference between Speed and Velocity?
Definition
 Speed and Velocity are different because speed is a measurement of distance and time but velocity is a measurement of speed and direction.
Term
 Newton (as in a measurement)
Definition
 The metric unit of force, equal to the force needed to make a 1 kg a object accelerate at 1 m/s^2
Term
 Newton's First Law
Definition
 An object at rest will stay at rest and an object in motion will stay in motion with the same velocity unless acted upon by an unbalanced force.
Term
 Newton's Second Law
Definition
 Acceleration is force/mass.   A=F/M F=MA M=F/A
Term
 Newton's Third Law
Definition
 For every action force, there is a reaction force equal in strength and opposite in direction.
Term
 What is the relationship between mass and acceleration?
Definition
 When mass goes up, acceleration goes down. This is called being inversely proportional.
Term
 In vacuum of outerspace
Definition
 When a spacecraft (in outerspace) is out of range from the gravitational pull of Earth, a spacecraft can travel in a constant direction, at a constant speed because that pull of gravity is gone.
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