A 2-m wide truck is moving with a unifor...

A `2-m` wide truck is moving with a uniform speed `v_(0)=8 ms^(-1)` along a straight horizontal road. `A` pedestrian starts to cross the road with a uniform speed `v` when the truck is `4 m` away from him, The minimum value of `v` so that he can cross the road safely is .

`(6)/(sqrt5)ms^(-1)`

`(4)/(sqrt5)ms^(-1)`

`(8)/(sqrt5)ms^(-1)`

`(2)/(sqrt5)ms^(-1)`

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