(adsbygoogle = window.adsbygoogle || []).push({}); Circular motion - Please help, I think the book's wrong!?

1. The problem statement, all variables and given/known data

A car of mass 400kg travels over a bump of radius 10m on a track in a fun park.

a) What force is exerted by the track on the car when it travels over the top of the hump at a speed of 6 m/s.

b) What is the minimum speed needed for the car to leave the track at the top of the hump?

2. Relevant equations

F = mv^2/t

a=V^2/r

P=2[tex]\prod[/tex]r

A=[tex]\prod[/tex]r^2

3. The attempt at a solution

a) v= 6m/s , Fnet=?

F=mv^2/r

F= (400)(6^2)/ 10

Fnet = 1440 N - WRONG!

RIGHT - 2600N

How did they get that answer? - Could someone please help with this issue.

Kindest Regards,

TheKovac

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# Homework Help: Circular motion - Please help, I think the book's wrong?

**Physics Forums | Science Articles, Homework Help, Discussion**