26. A car with mass M traveling at speed V has kinetic energy K. What is the kinetic energy of a second car that has the 1/4 times the mass M (1/4 smaller) and twice the speed V (2 x larger) of the first car? Provide a reasoning.
2K
K
8K
4K

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?