Answer:
centripetal acceleration = 4.5 m/s^2 ; centripetal force = 247.5 N
Step-by-step explanation:
centripetal acceleration = v^2 / r = 9^2 / 18 = 4.5 m/s^2
centripetal force = mv^2 / r = 4.5 x 55 = 247.5 N
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