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March 26, 2017

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Runner A is initially 6.0 mi west of a flagpole and is running with a constant velocity of 4.0 mi/h due east. Runner B is initially 4.0 mi east of the flagpole and is running with a constant velocity of 5.0 mi/h due west. How far are the runners from the flagpole when they meet?

  • physics - ,

    The first question is when do they meet?

    distance apart 8mi
    relative velocity is 9mi/hr

    time= distance/velocity= 8/9 hr

    how far did B go?
    distance= 5mi/hr*8/9 hr= 40/9 mi
    so they met (40/9-4) miles West of the flagpole.

  • physics - ,

    Runner A is initially 2.2 km west of a flagpole and is running with a constant velocity of 4.0 km/h due east. Runner B is initially 7.2 km east of the flagpole and is running with a constant velocity of 2.4 km/h due west. What will be the distance of the two runners from the flagpole when their paths cross?

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