1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Physics help!

  1. Mar 28, 2004 #1
    The mass of a boat is M=80kg, the mass of a boy is m=36kg. The boy moves from the stern to the bows of the boat. What distance does the boat move, if its length is 2.8m? At such low speeds the water resistance may be neglected. Hint: Center of mass remains at rest.

    Please help becuase I am stumped... :confused:
     
  2. jcsd
  3. Mar 28, 2004 #2
  4. Mar 29, 2004 #3
    [tex]M_{boat} \Delta {X_{boat}} + m_{boy}\Delta {X_{boy}} =0 [/tex]

    Coose ur reference frame let it be at the bow of the boat
    Now dboy=dboy/boat+dboat

    Let x be the displacement of boat then (Delta)Xboat = x
    then
    dboy = x-l

    Where l is the length
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Physics help!
  1. Physics help. (Replies: 4)

  2. Physics Help (Replies: 1)

  3. Physics Help (Replies: 2)

Loading...