You walk for 6.44 km with at a constant velocity of 2.54 m/s due west, turn around, and then walk with an average velocity of 0.480 m/s due east. from your starting point to your destination, your overall average velocity is 1.35 m/s due west. during the trip, how far east did you walk?

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?