The rear side of a truck is open A box of `40kg` mass is placed `5m` away from the open end as shown in The coefficient of friction between the box and the surface is 0.15. On a straight road, the truck starts from rest and accel erating with `2m//s^(2)`. At what dis tance from the starting point does the box dis-tance from the starting point does the box fall from the truck? (Ignore the size of the box)
.

Options

A. `20m`
B. `10m`
C. `sqrt20m`
D. `5m`

Answer

A

Explanation

`s =(1)/(2) at^(2) ,a^(1) =a - mu, t =sqrt((2l)/(a^(1))`