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Question

In the figure shown, all surfaces are smooth. Find acceleration of all the three blocks.
251054_a4461b59af884e678c327bda12c946fe.png

A
3
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B
6
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C
10
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D
5
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Solution

The correct option is D 3
Let a be the acceleration of the all three blocks.
Here all three blocks will act as a single body with mass, m=6+4+10=20kg
As force on left side is more so it will move to the right. Thus, the equation of motion of the system , ma=10040=60 N
or a=60/20=3 m/s2

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