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What is Physics?. Physics is A branch of science that involves the study of the physical world: energy , matter , and how they are related. SI Base Units. KNOW THESE!!!. Prefixes used with SI Units Know N ano to Kilo. Let’s Practice. METRIC CONVERSIONS.
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What is Physics? Physics is A branch of science that involves the study of the physical world: energy, matter, and how they are related.
SI Base Units KNOW THESE!!!
Let’s Practice METRIC CONVERSIONS
How many megahertz is 750 kilohertz? • 0.75 MHz
Convert 5021 centimeters to kilometers. • 5.021x10-2 km
How many seconds are in a leap year? • 31,622,400 s
Convert the speed 5.30 m/s to km/h. • 19.08 km/h
Your Turn To Investigate • Observations: • Circle the Quantifiable Observations • Given the instruments we have, what can we measure? __________________________________________________________________________
Precision vs Accuracy • What will we measure? How precise can we be? Why? • Hypothesis:
Design Your Own Experiment • Purpose:________________________________________________________________________________________________________ • Procedure:
What is the independent variable? _________ • What is the dependent variable? _________ • Conclusion: _________________________________________________________________________________________________________________________________________________________________________________________
Describing Motion • Motion Diagrams--- a series of images showing the positions of a moving object at equal time intervals • Particle Motion--- a simplified version of a motion diagram in which the object is replaced by a series of single points -size of the object must be much less than the distance it moves
Try: Motion Diagrams • Draw a motion diagram a tennis ball dropped at three different heights (use same time scale for each, relative estimation) and position the diagrams side by side one another for easy comparison. • What reminds constant? __________________________