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Q.

Two blocks A and B are connected by a massless string as shown in figure. Force of F=30N is applied on block (assuming no friction) B. Then distance traveled by the centre of mass in 2second starting from rest is x metres. Find the value of x.

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answer is 2.

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Detailed Solution

Acceleration of the centre of mass is acm=FmA+mB=3010+20=1m/s2

Distance travelled by the centre of mass in 2 second is S=12acmt2=12×1×4=2m

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