Question

A lorry carrying a heavy crate is travelling at 20m/s, when it turns onto an unbanked road. Radius of the bend is 40m. Static coefficient of friction between the crate and lorry is 0.9. The lorry has a width of 3.5m and the crate is in the middle of the lorry when it starts to slip. How long does the driver have to straighten up before the crate slips off the side of the lorry if the kinetic coefficient of friction is 0.7.

Answer 1