Question

a 28.0 kg solid cylinder is rolling without slipping across a horizontal surface at a speed of 8.4 m/s. how much work (in j) is required to stop it?

Answer 1

Not enough information is given to determine the moment of inertia of the object, so the problem is not solvable as given

E = 1/2 M V^2 determines the lateral kinetic energy of the object but one must also consider the rotational energy E = 1/2 I ω^2