A boulder rolls from the top of a mountain, travels across a valley below, and rolls part way up the ridge on the opposite side. Describe all the energy transformations taking place during these events and identify when they happenA. As the boulder rolls down the mountainside, KE is converted to PE. Asthe boulder rolls up the opposite slope, KE is converted to PE. Theboulder rolls only part way up the ridge because some of the PE hasbeen converted to thermal energy due to friction.B. As the boulder rolls down the mountainside, KE is converted to PE. Asthe boulder rolls up the opposite slope, PE is converted to KE. Theboulder rolls only part way up the ridge because some of the PE hasbeen converted to thermal energy due to friction.C. As the boulder rolls down the mountainside, PE is converted to KE. Asthe boulder rolls up the opposite slope, KE is converted to PE. Theboulder rolls only part way up the ridge because some of the PE hasbeen converted to thermal energy due to friction.D. As the boulder rolls down the mountainside, PE is converted to KE. Asthe boulder rolls up the opposite slope, PE is converted to KE. Theboulder rolls only part way up the ridge because some of the PE hasbeen converted to thermal energy due to friction.