The picture shows a van and a car traveling in the same direction . The 500 kg van going right at 5.0 m/s bumps into a 400 kg car moving in the same direction at 2.0 m/s . The car has a final speed of 4.0 m/s . What is the final velocity of the van ? Assume there are no net external forces and thus , momentum is conserved during the collision .

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?

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.

This is the number of complete movements of a wave per second.