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Motion -- process of changing place Force - something that make things move Magnitude -- refers to the size or strength (N) Direction -- point where the object goes Point of application -- location where the force applied Line of action -- straight line passing through the point of application...

Motion -- process of changing place Force - something that make things move Magnitude -- refers to the size or strength (N) Direction -- point where the object goes Point of application -- location where the force applied Line of action -- straight line passing through the point of application Types of forces: 1. Contact force A. Applied -- force that is exerted by a person towards another (F) B. Friction -- acts opposite or against another object (Ff) C. Normal -- acts perpendicular to an object (FN) D. Tension -- applied to a string, rope, chain, and cable (Ft) 2. Non-contact force A. Gravitational -- attracts the object towards the earth B. Magnetic -- attraction and repulsion Balance -- something that is stable Balance force -- equal magnitude but opposite direction Unbalance force -- force cause a change in motion Three law of motion 1. Law of inertia -- object maintain at rest when it's at rest is called "inertia" 2. Law of acceleration -- directly proportional to net force acting on it (the greater the mass the less it will accelerate) 3. Law of interaction -- for every action, there is an equal and opposite reaction) Work -- change in energy, happen when the force applied to the object causes the object to have a displacement work=Fd The unit joule is named after James Prescott joule - POTENTIAL -- stored energy, ready to be released - Chemical potential energy -- found in substances that stores energy at a submicroscopic level, readiness to undergo a chemical change - Physical potential energy -- also known as gravitational potential enrgy G.P.E = weight × height = mass × acceleration due to gravity × height P.E = mgh - KINETIC -- energy of moving object Acceleration -- rate of change in velocity a = vf-vi/t KE = ½ mv^2^ Substance Speed ----------- ------- Air 331 Water 1461 Wood 4000 Iron 5000 Aluminum 5140 Sound - Longitudinal wave - Form of mechanical wave/kinetic energy - Requires a medium - Faster at higher temperature, slower at lower temperature Light - Transverse wave exhibits characteristics and properties of an electromagnetic wave Dispersion - Lights separate through the prism into different colors Heat Temperature ≠ heat Thermometer -- the higher the kinetic Willian Thompson (K) 1848 Andres Celsius (°C) 1741 Daniel Gabriel Fahrenheit (°F) Form of energy that is transferred from one body to another due to the difference in temperature Conduction -- direct contact Convection -- through molecules Radiation -- space OHM'S LAW Current (I) = amperes (A) Voltage (V) = volts (v) Resistance (R) = Ohm's (Ω)