Question

A rod is inserted between two boxes as shown in figure. A horizontal force F is applied at the upper end of rod. Then

• A. box A will move first.
• B. box B will move first.
• C. both A and B will move simultaneously.
• D. can't be predicted.

Answer 1

The correct option is B box B will move first.


Here,$F_B>F_A$
where, $F_B=F_A+F$
Hence, box B will move first.