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Q.

What will be the acceleration of centre of mass (in m/s2) of the system of two blocks as shown in figure (g = 10 m/s2) ?

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a

Zero

b

12i^−8j^5

c

12i^−4j^5

d

4i^−12j^5

answer is B.

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Detailed Solution

a=2g2+3=4m/s2a→CM=m1a→1+m2a→2m1+m2=3(4i^)+2(−4j^)3+2=12i^−8j^5
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