Physics
posted by Gina .
A uniform solid cylinder of mass M = 2 kg is rolling without slipping along a horizontal surface. The velocity of its center of mass is 27.6 m/s. Calculate its energy.
I got 761.76 Joules but I think it's wrong.

Did you add the translational kinetic energy (1/2) M V^2 and the rotational kinetic energy (1/2) I w^2?
I = (1/2)MR^2 and w = V/R, so
Total KE = (3/4) M V^2