Friction - maximum acceleration without relative sliding

2026 1 question

1. A box of mass 15 kg is kept on the floor of a stationary trolley. The coefficient of static friction between the box and the trolley is 0.12. Keeping the box in stationary state over the trolley, the maximum acceleration with which the trolley can be moved horizontally in $m\,s^{-2}$ is: ($g = 10\ m/s^2$)