Astudent bikes to school by traveling first dn = 1.00 miles north, then dw = 0.600 miles west, and finally ds = 0.200 miles south. take the north direction as the positive  y  direction and east as positive  x. the origin is still where the student starts biking. let  d⃗  n  be the displacement vector corresponding to the first leg of the student's trip. express  d⃗  n  in component form

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?