An empty cylindrical barrel is open at one end and rolls without slipping straight down a hill. the barrel has a mass of 25.0 kg, a radius of 0.34 m, and a length of 0.850 m. the mass of the end of the barrel equals a fourth of the mass of its side, and the thickness of the barrel is negligible.
The acceleration due to gravity is 9.81 m/s^2. what is the translational speed v(f) of the barrel at the bottom of the hill if released from rest at a height of 25.0 m above the bottom?