i don't get why A is right Fext3m2mmThree blocks are sliding together to the right along a surface of negligible friction when a force with magnitude Fext is exerted to theleft on the rightmost block, as shown in the figure. The masses of the blocks are indicated in the figure. If the force is exerted for atime At, what is the change in velocity of the center of mass of the three-block system?Fert AtA6mFext At2m2FertAtCm6FertAtm

Let m denotes the smallest mass, M denotes the total mass, Fext denotes the external force that is…

Answered: F. ext 2m 3m m Three blocks are sliding…

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