roblem $5$ :

$(10$ points$)$ Given the dimensions for the concrete barrier, if a vehicle hit it$,$ with what force $P$ would it cause the barrier to move? Is it sliding or tipping? Use the approach discussed in the notes. Assume the weight of the barrier is $20$ kN and $h=48cm.$ The contact surfaces between the barrier and the pavement have static and kinetic coefficients of friction of $0\mathrm{.}45$ and $0\mathrm{.}40,$ respectively.

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