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Newton's Laws
Newton's Laws, Forces and Motion
24
Science
7th Grade
02/23/2015

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Term
Force
Definition
A push or a pull
Term
Newton
Definition
SI unit of force
Term
net force
Definition
The sum of two or more forces-  the overall force.
Term
Inertia
Definition
The tendency of an object to resist change in its motion.
Term
Newton's First Law
Definition
An object moving at a constant velocity keeps moving at that velocity unless acted upon by an unbalanced force.
Term
Real-life example of Newton's First Law
Definition
The use of seat belts to reduce injury.
Term
balanced force
Definition
Net force is zero
Term
Newton's Second Law
Definition

The acceleration of an object is in the same direction as the net force on the object.

Term
F=ma
Definition
Newton's Second Law
Term
Friction
Definition

The force that opposes the sliding motion of two surfaces that are touching each other.

Term
Static Friction
Definition

The force which must be overcome before an object can move.

Term
Sliding friction
Definition
Results when two surfaces are moving past each other.  Also called kinetic.
Term
Air Resistance
Definition
A friction-like force which opposes falling objects.
Term
Terminal velocity
Definition

The force of air resistance is equal to the force of gravity of a falling object.

Term
Gravity
Definition
The attractive force between any two objects
Term
Depends on the distance apart and mass of two objects
Definition
Gravity
Term
Weight
Definition
The gravitational force exerted on an object
Term
Newton's Third Law of Motion
Definition
For every action, there is an equal but opposite reaction
Term
An example of Newton's Third Law
Definition
Letting go of a balloon
Term
An example of Newton's Second Law
Definition

It takes 50N of force to accelerate a 1000Kg car to .05m/s2

Term
Motion
Definition

A change in an object's position determined by using reference point

Term

Causes an object to start moving, stop moving, or change directions.

Definition
Force
Term
If mass increases, the force of gravity results in a _____.
Definition
larger attraction
Term
The table cloth trick works better if the objects have ___
Definition
more inertia
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