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Change in the acceleration of Gravity given resistance

  1. Apr 23, 2013 #1
    Hello,

    This is the first time i have posted here and could really use some help, my class was given this question as enrichment after a free fall test and i would like to learn how to do it. i have checked my textbook but could not find any way to calculate the change in the acceleration of gravity given the resistance.

    1. The problem statement, all variables and given/known data

    a 50kg block is submerged in an unknown substance,the block is then dropped 10m to the bottom of the substance. if the substance provides a resistance of 300 N, how long does it take the block to reach the bottom? (Gravity = 9.81m/s^2)

    2. Relevant equations

    This is what i need help with.

    3. The attempt at a solution

    I sketched out the quesiton, but like i said i could not find any equations for this type of question.
     
    Last edited: Apr 23, 2013
  2. jcsd
  3. Apr 23, 2013 #2

    PhanthomJay

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    Are you familiar with free body diagrams showing the forces acting on the block, and newton's laws, and the kinematic motion equations? Please show an attempt.
     
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