1 求所做的功
已知:m1=100kg m2=0.9t=900kg g=9.8N/kg
h=9m
求:W
G=(m1+m2)g=(100+900)*9.8=9800N
W=Gh=9800*9=88200J
2 求功率
已知:W=88200J t=1min=60s
求:P
P=W/t=88200/60=1470w
3 求吊车起吊速度V
已知:S=9m t=1min=60s
求:V=S/t=9/60=0.15m/s
1 求所做的功
已知:m1=100kg m2=0.9t=900kg g=9.8N/kg
h=9m
求:W
G=(m1+m2)g=(100+900)*9.8=9800N
W=Gh=9800*9=88200J
2 求功率
已知:W=88200J t=1min=60s
求:P
P=W/t=88200/60=1470w
3 求吊车起吊速度V
已知:S=9m t=1min=60s
求:V=S/t=9/60=0.15m/s