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Question

A force F is applied horizontally to a block A of mass m1 which is in contact with a block B of mass m2, as shown in the figure. If the surfaces are frictionless, the force exerted by A on B is equal to


  1. m1Fm2

  2. m2Fm1

  3. m1Fm1+m2

  4. m2Fm1+m2


Solution

The correct option is D

m2Fm1+m2


Acceleration of the system, a=Fm1+m2
Now, the force exerted by A on B is responsible for the acceleration of block B and is given by F=m2a=m2Fm1+m2.
Hence, the correct choice is (d).

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