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Speed,v◦Thedistance anobjectmovesinacertainlengthoftime
Speedisa quantity
Representedbyanumberandunits(i.e.km/h,m/s,cm/s)SIunit:metres/second(m/s)
Constantspeed:
Changingspeed:
◦Whenanobjecttravelsthesamedistanceforeachtimeinterval
Whenanobjecttravelsadifferentdistanceforeachtimeinterval
Averagespeed◦Thedistancetravelledbyanobjectisdividedbythetimeittakestotravelthatdistance
𝑣avg = '+',
Averagespeed=+"#,0&1$,!02$33$+,4,03,"5$$306#$+
Example
◦Determinetheaveragespeedoftheobjectfrom4.5sto7.5s.
m =!"#$!%&
='(')
=(78(")78)"
= 88
=________m/s