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如图，某人以600N的力向下拉绕在滑轮组上的绳子的一端，绳子下端移动了1.5m，重物上升0.5m，已知该滑轮组的机械效率为70%．求： （1）在图中画出滑轮组的绕线情况． （2）被吊起重物的质量...
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如图所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10秒使绳端向下移动了1.5m
如图21所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10s使绳端向下移动了1.
如图23滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10秒使绳端向下移动了1.5m
如图所示人用600N的力向下拉绳子的一端10s使重物匀速上升了0.5m已知滑轮组的机械效率为70%求
如图23所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10秒使绳端向下移动了1.
如图所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10s使绳端向下移动了1.5
小华和他的兴趣小组利用如下图所示的滑轮组进行实验人以600N的力向下拉绕在滑轮组上的绳子的一端10秒
小华和他的兴趣小组利用如下图所示的滑轮组进行实验人以600N的力向下拉绕在滑轮组上的绳子的一端10秒
如图所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10秒使绳端向下移动了1.5
如图所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10秒使绳端向下移动了1.5m
如图所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10s使绳端向下移动了1.5
小明和他的兴趣小组利用如图所示的滑轮组进行实验人用600N的力向下拉绕在滑轮组上的绳子的一端10秒钟
如图所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10秒使绳端向下移动了1.5m
小华和他的兴趣小组利用如图所示的滑轮组进行实验人以600N的力向下拉绕在滑轮组上的绳子的一端10秒钟
如图所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10秒使绳端向下移动了1.5m
如图5所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组上的绳子端10s使绳端向下移动了1.
如图所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10秒使绳端向下移动了1.5
如图所示滑轮组的绕绳未画出人以600N的力向下拉动绕在滑轮组的绳子一端10秒使绳端向下移动了1.5m
小明和他的兴趣小组利用如图所示的滑轮组进行实验人用600N的力向下拉绕在滑轮组上的绳子的一端10秒钟
小华和他的兴趣小组利用如下图所示的滑轮组进行实验人以600N的力向下拉绕在滑轮组上的绳子的一端10秒
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