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Motion of a bee

  1. Jan 13, 2008 #1
    [SOLVED] motion of a bee

    1. The problem statement, all variables and given/known data
    A honeybee with a mass of 0.175 g lands on one end of a popsicle stick (Active Example 9-2). After sitting at rest for a moment, the bee runs toward the other end with a velocity 1.69 cm/s relative to the still water. What is the speed of the 4.95 g stick relative to the water? (Assume the bee's motion is in the negative direction.)

    Answer is in mm/s

    2. Relevant equations
    m1v1+m2v2


    3. The attempt at a solution

    I tried this 0+0=m1v1+m2v2 and plugged in 0=(0.175*-1690)+(4.95*v) and solved for v and got 59.7 mm/s but it was wrong.

    ** The bee is moving towards the right and the stick in floating in the water's direction towards the left.
     
  2. jcsd
  3. Jan 13, 2008 #2

    G01

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    Your conversion to millimeters is incorrect:

    1mm=.1 cm

    not .001 cm as you seem to be using.

    Try redoing the problem with the new conversion. Is your answer correct now?
     
  4. Jan 13, 2008 #3
    So the answer is 597 mm/s? did i do everything else right? i didn't really understand the problem.
     
  5. Jan 13, 2008 #4
    i just entered it and it's wrong.
     
  6. Jan 13, 2008 #5
    Ok i see what i did wrong instead of -16.9 i did 169 so my final answer recalculated is 0.597 mm/s...correct?
     
  7. Jan 13, 2008 #6

    G01

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    Yes, I agree with that.
     
  8. Jan 13, 2008 #7
    Thanks!
     
  9. Jan 13, 2008 #8

    G01

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    Anytime!:smile:
     
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