Susan's 13.0 kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30°above the floor. The tension is a constant 32.0 N and the coefficient of friction is 0.210. Susan's 13.0 kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30° above the floor. The tension is a constant 32.0 N and the coefficient of friction is 0.210.