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Speed Calculations

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A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer Look for what is given.

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km t = 40 min

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km t = 40 min What does the problem ask for?

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km t = 40 min

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km t = 40 min What formula will you use to find the answer?

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km t = 40 min s = d/t

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km t = 40 min s = d/t Now, plug in the given values into the formula.

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km t = 40 min s = d/ts = 10 km / 40 min.

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km t = 40 min s = d/ts = 10 km / 40 min. And solve!

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km t = 40 min s = d/ts = 10 km / 40 min. s = 0.25 km/min * 60 min. / hr =

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km t = 40 min s = d/ts = 10 km / 40 min. s = 0.25 km/min * 60 min. / hr = Write the answer in the answer section. Do not forget the units!

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Speed Calculations A cross-country runner runs 10 km in 40 minutes. What is his average speed? GivenF FormulaWorkAnswer d = 10 km t = 40 min s = d/ts = 10 km / 40 min. s = 0.25 km/min * 60 min. / hr = 15 km/hr

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer Look for what is given.

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr v f = 75 km/hr

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr v f = 75 km/hr t = 27 hrs

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr v f = 75 km/hr t = 27 hrs What does the problem ask for?

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr v f = 75 km/hr t = 27 hrs

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr v f = 75 km/hr t = 27 hrs What formula is required to find the answer?

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr v f = 75 km/hr t = 27 hrs a=(v f -v i )/t

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr v f = 75 km/hr t = 27 hrs a=(v f -v i )/t Now, plug in the values and solve!

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr v f = 75 km/hr t = 27 hrs a=(v f -v i )/t a=(75 km/hr – 48 km/hr) / 27 hrs

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr v f = 75 km/hr t = 27 hrs a=(v f -v i )/t a=(75 km/hr – 48 km/hr) / 27 hrs a= 27km/hr / 27 hr = 1 km/hr 2

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr v f = 75 km/hr t = 27 hrs a=(v f -v i )/t a=(75 km/hr – 48 km/hr) / 27 hrs a= 27km/hr / 27 hr = 1 km/hr 2 Write the answer in the answer section. Do not forget the units!

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Acceleration Calculations Calculate the acceleration of an object that changes speed from 48 km/hr to a speed of 75 km/hr in 27 hrs. GivenF FormulaWorkAnswer v i =48 km/hr v f = 75 km/hr t = 27 hrs a=(v f -v i )/t a=(75 km/hr – 48 km/hr) / 27 hrs a= 27km/hr / 27 hr = 1 km/hr 2 a=1 km/hr 2

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