Question

Two mass particles of masses m1 and m2 having mass 10gm each are placed at x1=10cm and x2=15cm on X axis, what is the position of center of mass of system?​

Answer 1

Answer:

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Explanation:

Let initially the centre of masses 10g, 20g and 30g are placed at a distance x

1

,x

2

andx

3

.Then x coordinate of centre of mass is given by

10+20+30

10x

1

+20x

2

+30x

3

=1

10x

1

+20x

2

+30x

3

=60......(1)

When 40g mass is added the new centre of mass becomes:

10x

1

+20x

2

+30x

3

+40x

4

=0.........(2)

60+40x

4

=0

x

4

=

40

−60

x

4

=−

2

3

New coordinates of the combined system is (−

2

3

,−

2

3

,−

2

3

)