TY JOUR TI INVESTIGATION OF ROLLING AND SLIDING FRICTION FORCES KW Rolling friction KW sliding friction KW travel length KW the coefficient of friction KW gravity JO Modern Technologies and Scientific and Technological Progress AU Scherbina, N.A. AU Sergacheva, E.A. PY 2020 IS 2020 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»