A 0.22-kg gerbil runs in place with a linear speed of 0.40 m/s on an exercise wheel that is shaped like a hoop and has a radius of 9 cm and a mass of 5.5 g. Find the angular momentum of the wheel after the gerbil jumps off the wheel and keeps running with the same speed of 0.40 m/s. Note that the angular momentum of the gerbil can be calculated by mvl, where l is the moment arm, the perpendicular distance from the center of the wheel to the extended line of the gerbil’s velocity vector.

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?