Chapters 1 and 2
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What’s the speed formula?
s= d/t
What is speed?
Distance something travels per unit of time
What is a constant?
no change in subject
What is changing speed?
Speed that changed overtime
Average speed?
s=d/t
Intanteous speed and it’s measurement tool is?
Amount speed in one instant Usually measured with a speedometer
Distance time graph?
A line graph with time on the bottom and distance on the side
What is a variable?
Something that can cause change in an experiment
Dependant Variable?
Is effecting by independent variable! It is the result of the independent variable
Independent Variable?
Changed to see effect on the dependent variable! Happens first!!
Derived Unit
Combination of SI units
SI Units
International System of Units from French in 1960
Base Unit?
based on an object or event in the physical world
Volume
Amount of space being used by an object
Mass
Amount of matter in an object
Matter
Anything that takes up space and has mass
Density
Mass per unit volume of a material Amount of matter in a 3-D figure
Graph?
Visual display of data
Types of Graphs
Bar graph- Used to compare data Line graph-Shows how dependent variable changes due to change in the independent variable. Shows data overtime Pie graph- Quanity is broken into parts and is usually in percentages
Acceleration
Rate of change in velocity
Acceleration formula
a= vf-vi _____ t ALWAYS FINAL MINUS INITIAL!
Centripal Acceleration
acceleration towards the center of a circular path
Scientific Method
• Question • Research • Hypothesis • Experiment • Analyze data • Conclusion
Motion?
Change in an objects position relative to a reference point