7 FindtheLengthofaCircularArc
MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.
Findthelengthofthearconacircleofradiusrinterceptedbyacentralangleθ.Roundanswertotwodecimalplaces.
1) r=4meters
θ=65°
A) 4.54meters B) 4.99 meters C) 4.09 meters D) 3.63 meters
2) r=55inches,θ=30°
A) 28.8inches B) 31.23 inches C) 30.09 inches D) 26.95 inches
3) r=9.11inches,θ=120°
A) 19.08inches B) 19.18 inches C) 19.28 inches D) 19.38 inches
Solvetheproblem.
4) Theminutehandofaclockis4incheslong.Howfardoesthetipoftheminutehandmovein25 minutes?If
necessary,roundtheanswertotwodecimalplaces.
A) 10.47inches B) 12.98 inches C) 11.7 inches D) 8.73 inches
5) Apendulumswingsthroughanangleof40° eachsecond.Ifthependulumis50 incheslong,howfardoesits
tipmoveeachsecond?Ifnecessary,roundtheanswertotwodecimalplaces.
A) 34.91inches B) 37.34 inches C) 36.2 inches D) 33.06 inches
6) Acarwheelhasa14–inchradius.Throughwhatangle(tothenearesttenthofadegree)doesthewheelturn
whenthecarrollsforward2ft?
A) 98.2° B) 103.2° C) 108.2° D) 113.2°
7) Awheelwitha34–inchradiusismarkedattwopointsontherim.Thedistancebetweenthemarksalongthe
wheelisfoundtobe15inches.Whatistheangle(tothenearesttenthofadegree)betweentheradiitothetwo
marks?
A) 25.3° B) 27.3° C) 23.3° D) 21.3°
8 UseLinearandAngularSpeedtoDescribeMotiononaCircularPath
MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.
Expresstheangularspeedinradianspersecond.
1) 120revolutionspersecond
A) 240πradianspersecond B) 240 radianspersecond
C) 120πradianspersecond D) 120 radianspersecond
Solvetheproblem.
2) Agearwitharadiusof2centimetersisturningatπ
9radianspersec.Whatisthelinearspeedatapointonthe
outeredgeofthegear?
A) 2π
9centimeterspersecond B) 9π
2centimeterspersecond
C) 18πcentimeterspersecond D) π
18 centimeterspersecond
3) Acaristravelingat49mph.Ifitstireshaveadiameterof27 inches,howfastarethecarʹstiresturning?Express
theanswerinrevolutionsperminute.Ifnecessary,roundtotwodecimalplaces.
A) 610.02revolutionsperminute B) 3832.89 revolutionsperminute
C) 604.02revolutionsperminute D) 1220.04 revolutionsperminute
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