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

    2
    ReputationRep:
    My questions may look like an essay but don't worry, simple stuff, I'm just jibbing...


    1) Okay I've attached a diagram of a stone ( pretty f**cked up anoo) moving with horizontal circular motion. So the string provides the centripetal force for the motion - horizontal component, and mg is the vertical component, so what is the vector sum of these 2 be?

    waitt... i get it :P mg is cancelled by a reaction force right?

    2) Okay for :

    a) a cyclist moving around a bend, the centripetal force is provided by the friction between the cyclist and the road

    b) a car going around a bend on a very slippery banked track, the centripetal force is provided by the horizontal component of the reaction force,

    my question is why is a not provided by the same force as b is - horizontal component of reaction...?

    Off course b can't be provided by friction between tyres road etc as it says very slippery but why is b not the case for a ?



    Thanks alot guys
    Attached Images
     
    Offline

    0
    ReputationRep:
    As you noted the road is slippery, so you assume that there is no friction on the car, the fact that the road is banked means that the reaction force will have a component parallel to the horizontal axis, rather than being vertical as in case (a)
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by VagnTheBrave)
    As you noted the road is slippery, so you assume that there is no friction on the car, the fact that the road is banked means that the reaction force will have a component parallel to the horizontal axis, rather than being vertical as in case (a)


    ahh of course, makes sense
    Thanks alot =]
 
 
 
  • 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
    What newspaper do you read/prefer?
  • 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.