Help to solve An acrobatic airplane performs a loop at an airshow. The centripetal acceleration the plane experiences is 14.7 m/s2. If it takes the pilot 45.0 seconds to complete the loop, what is the radius of the loop? Just waiting for answer as well :unsure: 
Circular motion: Centripetal acceleration: $\displaystyle a = \frac{v^2}{r}$ $\displaystyle v = r \omega$ and $\displaystyle \omega = \frac{2 \pi}{t}$ Therefore $\displaystyle a = \frac{4 \pi^2 r}{t^2}$ Rearrange that equation for $\displaystyle r$ and solve. 
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