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SPH4U unit 1 summary
Unit 1 summary that covers all topics, written by an A+ student.
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PrerequisiteSignificant digits
¤Used to write very large or small numbers in a convenient way
¤Only ONE number in front of the decimal point.
Rules for significant digits
¤All non-zero numbers are significant
¤Zeros between numbers are significant
¤Zeros at the END of a number with a decimal place are significant
¤Zeros at the END of a number with no decimal place are usually not significant
¤Zeros at the BEGINNING of a number are not significant
Significant Digit Use
¤In general, you want to give your answer using the LEAST number of significant digits given in the
question.
Rounding
¤If the next number is a 5 with nothing else behind it, even digits stay the same and odd digits are
increased by one
¤If the next number is a 5 with other digits behind it, always round up
Unit 1
Equations Of Motion
• Vf2= Vi2 + 2aΔd
• Vf= vi+at
• Δd= vit + ½ at2
• Δd= vft- ½ at2
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