anonymous
  • anonymous
An airplane travels 2100km at a speed of 1000km/h, then encounters a headwind which slows it down to 800km for the next 1300km. What was the average speed of the plane for this trip? (3 marks)
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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welshfella
  • welshfella
average speed = total distance travelled / total time taken
welshfella
  • welshfella
For the first part of the journey he work out the time using t1 = d / v.
welshfella
  • welshfella
and do the same for the second part first part t1 = 2100/100 hours 2nd part t2 = 1300/800 hours

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welshfella
  • welshfella
so average speed = (2100 + 1300) / (t1 + t2)
welshfella
  • welshfella
* typo first part = 2100 / 1000 hours

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