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Uniform Motion Round Trip

Uniform Motion Round Trip. Objective Solve problems involving uniform motion. Uniform Motion. Uniform motion is when an object moves without changing its speed. Solving Word Problems. 1. Draw a sketch 2. Identify unknowns 3. Assign variable 4. Make a chart

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Uniform Motion Round Trip

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  1. Uniform Motion Round Trip Objective Solve problems involving uniform motion

  2. Uniform Motion • Uniform motion is when an object moves without changing its speed.

  3. Solving Word Problems • 1. Draw a sketch • 2. Identify unknowns • 3. Assign variable • 4. Make a chart • 5. Write and solve an equation

  4. Equation for Motion Round Trip Distancefor object one equalsthe distance for object two.

  5. Example • A ski lift carried Maria up a slope at the rate of 6 km/h, and she skied back down parallel to the lift at 34 km/h. The round trip took 30 min. • How long did she ski?

  6. Draw a sketch Draw a Diagram 6 km/h 34 km/h

  7. Assign Variables • Let t = Maria’s skiing time • Notice that 30 min = ½ hour

  8. Make a Chart x =

  9. Maria skied for 4.5 minutes downhill. She went up the lift for 30-4.5 or 25.5 minutes. How far did she ski? Oh oh Since km/h is in hours 4.5min=__hrs Small to big divide. 4.5/60=3/40hours 3/40hr x 34km/h =2 and 11/20km

  10. Try This • Kathy hiked up a hill at 4 km/h and back down at 6km/h. His total hiking time was 3 hours. • How long did the trip up hill take him?

  11. Make a Chart x =

  12. Kathy hiked down the hill for 1 hr 12 min. How long did the trip up take her? SinceShe went up the hill for 3 hrs - 1 hr 12min 1 hr 48 min minutes

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