21. A hoop with a mass of 2.75 kg is rolling without

Last updated: 8/3/2022

21. A hoop with a mass of 2.75 kg is rolling without slipping along a horizontal surface with a speed of 4.5 m/s when it starts down a ramp that makes an angle of 25° below the horizontal. What is the rotational kinetic energy of the hoop after it has rolled 3.0 m down as measured along the surface of the ramp? O 62 J O 34 J O This question cannot be answered without knowing the radius of the hoop. O 45 J O 22 J