A motor with an efficiency of 88 percent operates a crane having an efficiency of 42 percentIf the power supplied to the motor is 6.2 kW, with what constant speed does the crane lift a 420 kg crate of machine parts?
overall efficiency 0.88 0.42 0.37 Pineff Pout (convert units to MKS) 62000.37 W/s Fd /s mgd /s mg v 4209.81 v solve for v I get about 0.56 m/s
overall efficiency 0.88 0.42 0.37 Pineff Pout (convert units to MKS) 62000.37 W/s Fd /s mgd /s mg v 4209.81 v solve for v I get about 0.56 m/s
