[问答题]
Two inclines have the same heff0+6a9pjoncs y w gk)-y:fp9 .lxcbu/ yb u9)ight but make different angles with the h9un qr :j ijg09)hch08g/wdaqc e(9vworizontal. The same steel ball is rolled down each incline. On whiaj)wr9 8q 0gwv i ehnccgu hd(0j:99q/ch incline will the speed of the ball at the bottom be greater? Explain.
Post time 2025-2-18 20:00:22
