Physics

Problem

An electric motor lifts a

12\,\text{kg}

crate vertically upward

5.0\,\text{m}

4.0\,\text{s}

. Twenty-five percent of the motor’s input energy is lost as thermal energy. What is the motor’s average input power? a)

1.5\times10^{2}\,\text{W}

5.9\times10^{2}\,\text{W}

2.0\times10^{2}\,\text{W}

2.3\times10^{2}\,\text{W}