Asked by Laura
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
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
Answers
Answered by
bobpursley
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
that assumes it stops at the top (ie has not gained KEnergy).
workin=energyused/.6
energylost in machine=workin*.4