1. The maginitude of the acceleration is equal to speed squared. We know this from the vector and tangent work done in class, the delta v is always inward.
2. Acceleration is equal to speed (v) squared over the radius. We found this based on our drawings from the packet and more delta v and tangent/vector work.
3. since the equation is a= v^2 / r
2= 4^2/r
2=16/r
r= 8
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