a c = 4 π 2 r T 2 {\displaystyle a_{c}={\frac {4\pi ^{2}r}{T^{2}}}} a c = 4 ⋅ π 2 ⋅ 0.541 m 0.638 s 2 {\displaystyle a_{c}={\frac {4\cdot \pi ^{2}\cdot 0.541m}{0.638s^{2}}}} a c = 52.470 m / s 2 {\displaystyle a_{c}=52.470m/s^{2}}
