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Motion in straight line

  1. Apr 18, 2013 #1
    Two towns A and B are connected
    by a regular bus service with a bus
    leaving in either direction every T
    minutes. A man cycling with a
    speed of 20 km h –1 in the
    direction A to B notices that a bus
    goes past him every 18 min in the
    direction of his motion, and every
    6 min in the opposite direction.
    What is the period T of the bus
    service and with what speed
    (assumed constant) do the buses
    ply on the road?
     
  2. jcsd
  3. Apr 18, 2013 #2

    Simon Bridge

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    Looks good - what have you tried?
    Is this homework?
     
  4. Apr 18, 2013 #3
    No not homework. I know concept of relative velocity will be used to solve this problem but I am having trouble in forming the equations.
     
  5. Apr 18, 2013 #4

    Simon Bridge

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    It's actually wave motion - doppler effect.
     
  6. Apr 18, 2013 #5
    Aah..got the answer.
    time period of bus service= 9 min.
    Velocity of bus = 40 km/hr

    And thanks for responding.
     
  7. Apr 18, 2013 #6

    Simon Bridge

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    Well done :)
     
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