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# Need help with centripetal force question Watch

1. There's part of this question which asks to calculate the reaction force exerted on each rider.

I understand that for A I need to do R = weight + centripetal force

And I know that for B I need to do R = centripetal force - weight but I do not understand why. Any explanation?
2. Is that definitely the correct way round?

Because to me that looks like

At A the resultant force is Centripetal force - weight

At B the resultant force is Centripetal force + weight
3. (Original post by Music With Rocks;[url="tel:65748549")
65748549[/url]]Is that definitely the correct way round?

Because to me that looks like

At A the resultant force is Centripetal force - weight

At B the resultant force is Centripetal force + weight
It's not resultant force, it's the reaction force of the floor on the rider
4. (Original post by xturqz)
It's not resultant force, it's the reaction force of the floor on the rider
Reaction force is the force put on the person by the cage. At B R is acting downwards and so is weight.
5. Because centrapetal force acts towards the centre. The bottom man A would be R - W as W is acting down
As where for B bith R and W is acting towards the centre

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Updated: June 15, 2016
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