Physics · LAWS OF MOTION

A heavy wooden box rests on the flat floor of a train compartment accelerating horizontally at \( a = 2\text{ m/s}^2 \). Taking \( g = 10\text{ m/s}^2 \), the minimum coefficient of static friction between the box and the floor required to prevent the box from slipping relative to the train floor is:

1. A
   0.20
2. B
   0.15
3. C
   0.10
4. D
   0.25