(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

12. A motorcycle travels around a vertical 12 m radius loop. What is its speed at the top of the loop if the normal force exerted by the seat on the driver is equal to ¼ of his weight?

a. 7 m/s

b. 8.1 m/s

*c. 9.4 m/s

d. 15 m/s

e. 88 m/s

2. Relevant equations

F=ma

W=mg

T=F-W

a=v^{2}/r

3. The attempt at a solution

I did (1/4)W=m(v^{2}/r)-W and I got 12.1 m/s

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# Rotational Motion Speed at the top of the loop

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