Unit+5+-+Forces+in+Equlibrium

=__Unit 5 - Forces in Equilibrium__= Key Terms: force net (unbalanced) force inertia Newton’s first law of motion (law of inertia) newton (unit) Newton’s second law of motion weight air resistance Newton’s third law of motion normal force free-body diagram translational equilibrium condition for translational equilibrium force of friction terminal velocity

Newton's Laws of Motion

 * 1) Newton's 1st Law - (Law of Inertia) -
 * Objects in motion will tend to stay in motion, unless acted upon by an outside, unbalanced force.
 * Objects at rest will tend to stay at rest, unless acted upon by an outside, unbalanced force.
 * 1) Newton's 2nd Law
 * The acceleration of an object is directly proportional to the net force upon the object and inversely proportional to the mass of the object.
 * a = Fnet/m or Fnet = ma
 * Units of Force: Newton (N) = kg m/s^2
 * 1) Newton's 3rd Law (action reaction)
 * For every force, there is an force there is an equal and opposite in force. Equal in force, opposite in direction.
 * Commonly known as: "For every action, there is an equal and opposite reaction"
 * All forces will come in "force pairs" - If "A" acts on "B" then "B" will act on "A"
 * 1) You push down on the floor, the floor will push up on you.

Friction: - Friction is a force that opposes motion or impending motion

Resources: @http://www.sciencejoywagon.com/physicszone/02forces/forces.php Use the login: grinder password: punch

http://www.physicsclassroom.com/class/newtlaws/u2l2c.cfm

Force Diagrams SLIDESHOW: http://www.wisc-online.com/Objects/ViewObject.aspx?ID=tp1502

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