four particles A,B,C, D with masses m, 2m, 3m, 4m are placed at a corner of square. they have accelerations of equal magnitude and direction. the acceleration of centre of mass
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What we will find in this question
Answered by
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Explanation:
a
A
=−a
j
^
a
B
=a
j
^
a
C
=a
i
^
a
D
=−a
j
^
a
cm
=
m
a
+m
b
+m
c
+m
d
m
a
a
a
+m
b
a
b
+m
c
a
c
+m
d
a
d
a
cm
=
10m
−ma
i
^
+2ma
j
+3ma
i
^
−4ma
j
^
=
10m
3ma
j
^
−2ma
j
^
=
5
a
i
^
−
5
a
j
^
=
5
a
(
i
^
−
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