Question

Two blocks A and B with masses $m$ and $2m$ are held against a vertical wall. The horizontal force applied to both the blocks is $25N$. Assuming coefficient of friction is same in both cases, the correct relation is

• A. frictional force on A > frictional force on B
• B. frictional force on B > frictional force on A
• C. frictional force on A = frictional force on B
• D. None of the above

Answer 1

The correct option is C

frictional force on A = frictional force on B

Frictional force $f$ = coefficient of friction$\times$Normal reaction

Normal reaction is the horizontal force applied. In both cases normal reaction is same. So, frictional force is same.