A crane lifts materials at a constant power of for the first and then at for the next

PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A crane lifts materials at a constant power of

2.0\,\text{kW}

for the first

3\,\text{min}

and then at

3.0\,\text{kW}

for the next

2\,\text{min}

. Answer the following: (i) Calculate the total work done during the entire

5\,\text{min}

operation. (ii) Determine the average power for the whole period.