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পূর্ব দিকে গতিশীল দুটি কণার বেগ যথাক্রমে `4m*s^-1` ও `6m*s^-1`, পশ্চিম দিকে গতিশীল অন্য তিনটি কণার বেগ যথাক্রমে `2m*s^-1, 3m*s^-1` ও `5m*s^-1`। এই পাঁ

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পূর্ব দিকে গতিশীল দুটি কণার বেগ যথাক্রমে `4m*s^-1` ও `6m*s^-1`, পশ্চিম দিকে গতিশীল অন্য তিনটি কণার বেগ যথাক্রমে `2m*s^-1, 3m*s^-1` ও `5m*s^-1`। এই পাঁচটি কণার মূল গড় বর্গবেগ অর্থাৎ rms বেগ হল
A. শূন্য
B. `4m*s^-1`
C. `1.667m*s^-1`
D. `4.242m*s^-1`
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Correct Answer - D
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