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Published byNeal Jordan Modified over 8 years ago
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Motion
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Late Start – When do they meet? Red Guy runs 12 yd/sec Blue Guy runs 8 yd/sec AND gets a 1 sec head start gets a 1 sec head start When do they meet? Distance = ratetime Red Guy Blue Guy
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t + 1 t + 1 8 D = D = Blue Guy t 12 12 D = D = Red Guy timerate Distance = Solve the system of equations to find the distance where they meet AND the time they meet?
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Airplane dilemma There & Back SFO to Heathrow 10 hrs 25 min Heathrow to SFO 11 hrs 40 min Why are the times different? Distance = rate x time What else has to be different? What effects the rate? Is the distance different?
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Kayaks There & Back 3 hours to go downstream 5 hours to go upstream Why are the times different? The current is 6 mph. Write the speed for downstream _________________________ Write the speed for upstream _________________________ d= r t
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Complete the table Distance = ratetime downstream upstream
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Solve the system of equations Distanceratetime downstream upstream
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You Try… An airplane flew for 5 hours with a tail wind of 25km/h. The return flight against the wind took 6 hrs Find the speed of the airplane HINT: speed is rate HINT: speed is rate Distanceratetime Flight There Return Flight
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Opposite Directions Two trains leave town at the same time going opposite directions Slow train is going 60 km/h Fast train is going 120 km/h In how many hours will they be 300 km apart? TOWN 300 kmFast TrainSlow Train
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Solve the system DistanceRateTime Fast Train D fast 120t Slow Train D slow 60t Distance of Slow Trian plus Distance of Fast Train is 300 60t + 120t = 300 60t + 120t = 300
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