Can somebody help me out with physics? please show the work step by step

Physics
Tutor: None Selected Time limit: 1 Day

A car moving at 10.0 m/s encounters a bump that has a circular cross-section with a radius of 30.0 m. What is the normal force exerted by the seat of the car on a 60.0-kg passenger when the car is at the top of the bump?

Jun 8th, 2015

Thank you for the opportunity to help you with your question!

The forces acting on the car at the highest point of the bump are its weight downward and normal force up. There has to be a net force downward force to keep the car moving over the bump. 

mass = 60 kg 
speed = 10 m/s 
force by the seat = Fseat 

mv^2/R = N - mg 
N = m(g + v^2/R) = (60)(9.8 + (10)^2/30) 

 Answer=788 N

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 8th, 2015

Sorry, actually the answer is wrong it should be  389N can you show me how to get this?

Jun 8th, 2015

let me check...coz it's seems the answer is just half of my answer...5mins plz

Jun 8th, 2015

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Jun 8th, 2015
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Jun 8th, 2015
Dec 5th, 2016
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