User:Saboteur~enwiki/Sandbox

$$ a_c = \frac{4 \pi^{2} r} {T^{2}} $$ $$ a_c = \frac{4 \cdot \pi^{2} \cdot 0.541m} {0.638s^{2}} $$ $$ a_c = 52.470m/s^{2} $$