as we know
r = ( m1 r1 + m2 r2 + m3 r3) / ( m1 + m2 + m3)
r = ( 1* 0 + 2* 0.3 + 1* 4) / ( 1 + 2 +1)
r = 1.15 m
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QUESTION 8 3 balls are positioned on thex axis. The first ball has a mass of...
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