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Ms. Pearson's Science Site

Laws, Formulas,Conversions 2004-2005 2nd Semester

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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

** also see links for more information

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.

Two light bulbs in a series circuit with a battery
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 you
    EXP 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 
    •  

Things you will need to know(CLICK HERE)

Links

Acceleration Due To Gravity

Free Fall and the Acceleration of Gravity

Paper Airplanes

paper air planes