省力杠杆省的力到哪里去了?
省力杠杆省的力到哪里去了?
物理人气:309 ℃时间:2020-01-29 00:39:56
优质解答
到距离上去了,省力杠杆,省力费距离,任何机械不能省功.做功=力×力方向上的距离
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