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Answer:
Ball 3 (tennis ball)
Explanation:
Formula we are using :
acceleration = Force / mass
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Ball 1 :
⇒ acceleration = 15 N / 0.5 kg
⇒ acceleration = 30 m/s²
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Ball 2 :
⇒ acceleration = 15 N / 4.5 kg
⇒ acceleration = 30/9 m/s²
⇒ acceleration = 10/3 m/s²
⇒ acceleration = 3.33 m/s²
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Ball 3 :
⇒ acceleration = 15 N/ 0.05 kg
⇒ acceleration = 300 m/s²
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On comparing, we see that Ball 3 (tennis ball) has the greatest acceleration.