Rate-Time-Distance Problems

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DISTANCE: (d=rt).

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Presentation transcript:

Rate-Time-Distance Problems Section 4.8 Rate-Time-Distance Problems

Uniform Motion Problems What is uniform motion? Motion without a change in speed/rate Free powerpoint template: www.brainybetty.com

Three Types of Problems Type of Problem Key to Solving Opposite Direction (toward or away) Distances add to a total. Same Direction (catch-up) Distances are equal. Same Direction (two-part trip) Distance add to a total. Round Trip Distances are equal. Free powerpoint template: www.brainybetty.com

Free powerpoint template: www.brainybetty.com Example 1 Bicyclists Brent and Jane started at noon from points 60 km apart and rode toward each other, meeting at 1:30 PM. Brent’s speed was 4 km/hr greater than Jane’s speed. Find their speeds. What type of problem is this? Add or Equal? Rate X Time= Distance Brent Jane Equation: (see text book) Free powerpoint template: www.brainybetty.com

Free powerpoint template: www.brainybetty.com Example 2: A helicopter leaves Central Airport and flies north at 180 mi/hr. Twenty minutes later a plane leaves the airport and follows the helicopter at 330 mi/hr. How long does it take the plane to overtake the helicopter? What type of problem is this? Add or Equal? Rate X Time= Distance Helicopter Plane Equation: (see text book) Free powerpoint template: www.brainybetty.com

Free powerpoint template: www.brainybetty.com Example 3: A ski lift carried Maria up a slope at the rate of 6 km/hr, and she skied back down parallel to the lift at 34 km/hr. The round trip took 30 minutes. How far did she ski and for how long? What type of problem is this? Add or Equal? Rate X Time= Distance Up Down Equation: (see text book) Free powerpoint template: www.brainybetty.com

Free powerpoint template: www.brainybetty.com Assignment SEE SYLLABUS Free powerpoint template: www.brainybetty.com