Question : A 2 m wide truck is moving with a uniform speed 𝑣0 = 8ms−1 along a straight horizontal road. A pedestrian starts to cross the road with a uniform speed 𝑣 when the truck is 4m away from him. The minimum value of 𝑣, so that he can cross the road safely is
(A) 2.62ms^{-1}
(B) 4.6ms^{-1}
(C) 3.57ms^{-1}
(D) 1.414ms^{-1}
Answer : option (C)
Solution :
