A 21 newton force keeps a 3 kg object in uniform circular motion. The speed of the object is 9 m/s. The magnitude of the centripetal acceleration is


3 m/s^2
7 m/s^2
27 m/s^2
30 m/s^2

Respuesta :

Answer:

Explanation:

F = ma

a = F/m = 21/3 = 7 m/s²

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