energy used: mgh=68*3
that assumes it stops at the top (ie has not gained KEnergy).
workin=energyused/.6
energylost in machine=workin*.4
A block and tackle has a velocity of 6 and it is being used to raise a mass of 68 newtons through 3 meters. The efficiency is 60%
Calculate the amount of energy needed to lift the mass through 3 meters and calculate the amount of energy that was put into the system
and the loss of energy involved in operating the machine
1 answer
3 answers