An object rolls without slipping onto a surface where the coefficient of friction between object and surface is twice as great as that needed to prevent slipping. part a: - describe the subsequent motion: -a) the object begins to slip, and the actual force of static friction doesn't change. b) the object continues to roll without slipping, and the actual force of static friction doesn't change. c) the object continues to roll without slipping, and the actual force of static friction increases. d) the object begins to slip, and the actual force of static friction increases.