2个回答
展开全部
2013年北京
(1)V=M/p=0.06m3
F浮=1X1000X10X0.06=600N
(2)3F=G滑+G物=30+1200
F=410N
FA=2F+G滑=820N+30N=850N
2F1=G滑+F=30+410=440N
F1=210N
P=FV=210X6x0.5=660W
(3)P1=(G人+F1)/S
P2=(G人+F2)/S
P1/ P2=(G人+F1)/(G人+F2)
F2=121.25N
W有=(G物-F浮)h
S=6h
W总= F2S=6 F2h
W有/W总=600h/121.25X6=600/721.5
=0.83
(1)V=M/p=0.06m3
F浮=1X1000X10X0.06=600N
(2)3F=G滑+G物=30+1200
F=410N
FA=2F+G滑=820N+30N=850N
2F1=G滑+F=30+410=440N
F1=210N
P=FV=210X6x0.5=660W
(3)P1=(G人+F1)/S
P2=(G人+F2)/S
P1/ P2=(G人+F1)/(G人+F2)
F2=121.25N
W有=(G物-F浮)h
S=6h
W总= F2S=6 F2h
W有/W总=600h/121.25X6=600/721.5
=0.83
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