CarRace


Home > Do Mathematics -> K-7 Algebra and Functions -> Linear Functions -> Car Race

Race the cars! - Classroom/Home Simulator  (See also: Students Building Simulators - Car Race)

 
     

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Sample question for Level: Algebra 1 Problem:  

Set RED CAR: Speed=15km/h and Start=24km and BLUE CAR: Start=0km.

Question: If the cars meet in 4 hours, what is SPEED of BLUE CAR?    

Use the activity to find your answer and then talk about the math. Answer A: Using the activity.

  • Set the 3 sliders.
  • Think about what it means to "meet in 4 hours".
  • Find t=4 on the horizontal axis.
  • Move the 4th slider (speed of blue car) until the lines intersect above t=4.
  • See that the slider is at 21km/h.
Answer B: Thinking about the math.
  • Thinking: blue car has to "catch up" 24 km in 4 hours.
  • This means it must go 24km/4h=6km/h faster than red car.
  • The speed of red car is 15km/h.
  • So the speed of blue car is 15km/h+6km/h=21km/h.
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Home > Do Mathematics -> Algebra and Functions -> Linear Functions -> CarRace

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