      Ms. Pearson's Science Site Laws, Formulas,Conversions 2004-2005 2nd Semester    Home Physical Science Class Physical science LFC Semester Exams (Review) AP Enviromental Science science fair project  Laws

Force, Movement
• *(Newton's First Law) - An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

• *(Newton's Second Law) - The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.

• *(Newton's Third Law) - "For every action, there is an equal and opposite reaction."

*The following laws are not defined as stated exactly in the book but were writen in the thought that you the reader can beter understand them, and also remember them in a non-complex way

Conversions

• Pounds to Kilograms = Lb * 0.45
• Pounds to Newton = Lb * 4.45

Pictures

## Series circuit

In an electrical circuit, several electrical devices such as light bulbs can be placed in a line or in series in the circuit between the positive and negative poles of the battery. This is called a series circuit. Figure 2 - Two light bulbs in a series circuit with a battery

Parallel Circuit:   Formula To Find Speed = Distance / Time To Find Distance = Speed * Time To Find Time =   Distance / Speed To Find Acceleration = VF - VI / T Vf = Velocity Final Vi = Velocity Initial To Find Force = Mass * Acceleration Force = Kilograms, Miles Per Second Square Kilograms, Miles Per Second Square = Newtons Fw = M*g (force [weight] = mass * gravity) Gravity Acceleration = 9.8 m/s to find Momentum - [P = Mass * Velocity] to find MA  =  Fr/Fe To find IMA = de/dr Lever = Wheel and Axle Incline plane Wedge Gears Pulley ------Efficency------- Efficiency - a measure of how much of the work put into a machine is changed to useful work by the output of the machine. __Formula __ % = wout/ win -------Power-------  Power - is the rate at which work is done __Formula__ P = W/T  or (Power = work / time) --------Joules----------- joules - is a measure of work __Formula__ W = F * D  or  (Work = force * distance) -----------Kintetic------------ Kintetic - Energy in action __Formula__ Ek =  1/2 Mass * (volume [squared]) -----------Potential----------- Potential - energy in storage __Formula__ Ep = Mass * gravity * Height  ---------------Work------------- is the actual exerting force up agianst gravity and is not halling it with youEXP lifting your bookbag= work hauling it on your back isn't __Formula__ Work = Weight * Meters --------Velocity--------- __Formula__ Velocity = Distance / Time --------Ohms Law------- __Formula__ Resistance or Ohms = Volts /Amps -----------Volts----------  __Formula__ Volts = Amps * Resistance or Ohms -----------Amps---------- __Formula__ Amps = Volts / Resistance or Ohms • Newtons Laws And Definitons
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• Newton's Laws of Motion
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• ### Lesson 4 : Newton's Third Law of Motion

Acceleration Due To Gravity

Paper Airplanes  