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March 24, 2017

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An antelope has traveled 1.60 km at avg speed of 67.0 km/h. The antelope speed during the first half of the distance is 88km/h. Find the antelope's avg speed during the second half of the run.

  • Physics - ,

    The time is the distance divided by the velocity. The total time is the time at 88km/h + the time at the unknown speed v. Half the distance is run at each speed:

    0.8/88 + 0.8/v = 1.6/67

    .009091 + 0.8/v = .02388
    .8/v = 0.01365
    v = 58.6 km/h

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