A stone fell from a height of 50m above the ground if the acceleration due to gravity is l0m/s2. find the velocity in which it hits the ground and the time taken by the stone to reach the ground.

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?