A) force is the same for all surfaces
B) \[8\,cm\times 5\,cm\] surface
C) \[5\,cm\times 15\,cm\] surface
D) \[8\,cm\times 15\,cm\] surface
Correct Answer: A
Solution :Sides of block \[=5cm\times 8cm\times 15cm.\]. The force required to push the iron block is independent of the area of contact. Therefore required forces will be same for all the surfaces.
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