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  4. Two balls are thrown in air. The second ball is thrown 2 seconds after the first ball. The acceleration of the center of mass of the two balls while in air :

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Q. Two balls are thrown in air. The second ball is thrown $2$ seconds after the first ball. The acceleration of the center of mass of the two balls while in air :

NTA AbhyasNTA Abhyas 2022

Solution:

$a_{C M}=\frac{f_{\text{net }}}{m}=\frac{m g + m g}{2 m}=g$