Hi everyone, i'm new here and hope someone can enlighten me as to how to solve the following problem.
An electric crane uses 8.0A at 150V to raise a concrete block of 350kg at 12m/min. Determine the efficiency of the system.
power = current x voltage
so P = 1200J
this should be the input right?
as for the output, i can only work out the kinetic energy and not able to find the power output.
so wondering how do i go about solving this question? thanks in advance!