A small block B is placed on another block A of

Question:

A small block B is placed on another block A of mass $5 \mathrm{~kg}$ and length $20 \mathrm{~cm}$. Initially the block B is near the right end of block A. A constant horizontal force of $10 \mathrm{~N}$ is applied to the block A. All the surfaces are assumed frictionless. Find the time elapsed before the block $B$ separates from $A$.

Solution:

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