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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
>>
2001
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Q)
The velocities of three particles of masses
20
g
,
30
g
and
50
g
are
10
ˆ
i
,
10
ˆ
j
and
10
ˆ
k
respectively. The velocity of the centre of mass of the three particles is :
( A )
2
ˆ
i
+
30
ˆ
j
+
50
ˆ
k
( B )
10
(
ˆ
i
+
ˆ
j
+
ˆ
k
)
( C )
20
ˆ
i
+
30
ˆ
j
+
50
ˆ
k
( D )
2
ˆ
i
+
3
ˆ
j
+
5
ˆ
k
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