Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    There's several parts to this question which I have been able to complete successfully , however I am having difficulties with the following ;

    e. Show , further , that equilibrium is only possible when ?>?c , where

    ?c = ((40/81) - (4/3)*sin alpha +sin^2 alpha)/(-1/3 +cos&)

    The hint is that the magnitude of F (which we know) = m?c * N . I cant' seem to form the ?c equation using this hint .

    magnitude of f = ((40/81) - (4/3)*sin alpha +sin^2 alpha)
    N=mg(-1/3 +cos alpha)

    Note the ? are supposed to represent the symbol for the coefficient of static friction .
    Thank you for your help .
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Will you be richer or poorer than your parents?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.