Unit Five: Newton's Laws and Equilibrium

In physics, we went over Newton's Law. Last night's post was also about Newton's Laws but were from the Internet. Today, Mr. Blake gave out the terms we needed to know for class for each law.

1.     Newton's First Law

a.     The Law of Inertia

b.     Objects at rest will stay at rest and objects in motion will tend to stay in motion unless acted upon outside unbalanced forces.

2.     Newton's Second Law

a.     The acceleration of an object is directly proportional to the net force on an object and acceleration is inversely proportionate to the object's mass.

                                               i.     a ∝ Fnet

                                              ii.   a ∝ 1/m

                                            iii.     a = Fnet/m

                                            iv.     Fnet = ma

b.     These equations mean that i) the acceleration of an object is directly proportionate to the force net of the same object, ii) the acceleration of an object is inversely proportionate to the mass of the same object, iii) the acceleration of an object equals the force net over the mass of the same object, iv) the force net on an object equals the mass times the acceleration of the same object.

3.     Newton's Third Law

a.     Action – Reaction

b.     For every action/force, there is an equal and opposite force/direction.

Here are some other things that you should know:

1.     Force – a push or pull

2.     Frictional  forces – forces that opposes motion or impending motion

3.     Contact forces – a force that acts at the point of contact of two objects

4.     Distance force – a force at a distance

5.     Balanced forces – uniform motions, or equilibrium that have no acceleration

Me being totally lame and trying to push my huge sofa to represent push and friction

Me being even more lame and trying to pull my other sofa to represent tension.