Answer:[tex]2.94 m/s^2[/tex]
Explanation:
Given
Coefficient of static friction [tex]\mu _s=0.3[/tex]
Coefficient of Kinetic friction [tex]\mu_k=0.2[/tex]
as  the tool box laid over the truck so there must a thresold force must be applied such that it overcomes the static friction in order to start moving
[tex]a_{max}=\mu _s\times g[/tex]
[tex]a_{max}=0.3\times 9.8=2.94 m/s^2[/tex]
