Physics

Problem

A machine delivers power of

300\,\text{W}

for the first

10\,\text{s}

and

900\,\text{W}

for the next

5\,\text{s}

. What is its average power output over the entire

15\,\text{s}

interval? a)

600\,\text{W}

500\,\text{W}

750\,\text{W}

450\,\text{W}