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    Hi, could someone please explain to me why the pointer moves to the left if the centripetal force is acting to the right? I know that it should but just can't explain why and the mark scheme doesn't help.



    Taken from the AQA January 2003 PHYB exam.
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    (Original post by nonon41)
    Hi, could someone please explain to me why the pointer moves to the left if the centripetal force is acting to the right? I know that it should but just can't explain why and the mark scheme doesn't help.



    Taken from the AQA January 2003 PHYB exam.
    It's because of the reaction force. Think of it this way; you know there is a centripetal force acting to the right, but there is also a force to balance this, otherwise the car would just keep moving in towards the bend and crash. The spring also experiences this reaction force, which is why it moves towards the left.
 
 
 
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