In a rear-end collision the automobile that is accelerated to a velocity V in 0.01 s. What is the minimum velocity at which there is danger of neck fracture from whiplash? Utilize the fact the stretch rupture strength or maximum pressure that that a bone can with stand without fracture is 83 MPa, and suppose that the area of the cervical vertebra is 1 square centimetre and the mass of the head is 5 kg.