Please answer the question in the picture

Porque crees que el agua no podia subir mas de 10 m de altura con ese tipo de bomba

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

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?