Essential QuestionsHow do objects move? How can I calculate motion? Vocabulary· (Review) significant figures – a way of writing data that tells the reader how precise a measurement is · controlled experiment – an experiment in which only one variable is tested at a time · independent variable – the variable that the scientist changes · dependent variable – the variable that the scientist measures; it depends on changes in the independent variable · control variable – any variable that is kept constant throughout the experiment · (NOT for mastery) directly proportional – a mathematical relationship where two variables increase together or decrease together · (NOT for mastery) inversely proportional – a mathematical relationship where as one variable increases, the other decreases (and viceversa) · scalar – a quantity with just a magnitude (number) · vector – quantity with both a magnitude and a direction · distance (d) – a scalar quantity that measures “how much ground has been covered” · displacement (d) – a vector quantity that states how far you are from your original starting point · (Review) meter (m) – the metric unit of length, distance, and displacement · speed (s) – a scalar quantity that measures how fast an object moves · velocity (v) – a vector quantity that measures the rate at which an object changes displacement/position · meters per second (m/s) – the metric unit of speed and velocity · acceleration (a) – a vector quantity that measures the rate at which an object changes velocity · meters per second squared (m/s^{2}) – the metric unit of acceleration · delta (Δ) – a symbol used in science to mean “change in” · PT graph – a graph that shows an object’s position as a function of time · VT graph – a graph that shows an object’s velocity as a function of time · kinematic equations – a set of four equations that show the relationships between time, displacement, initial velocity, final velocity, and acceleration · acceleration of gravity (g) – the acceleration due to gravity at the surface of the earth; g = 9.8 m/s^{2} · projectile motion – the motion that occurs when an object is released or launched in such a way that gravity is the only force acting on it · component vector – the x or y “legs” of a vector · resultant vector – the vector sum of two or more component vectors 
HS Physics >
Phys Unit 1: Sig Figs and Motion (13 days)
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Aug 18, 2012, 7:07 PM  Emilie Siverling 