Physics

Problem

A horse pulls a cart for the first

20\,\text{m}

with a force of

400\,\text{N}

and for the next

20\,\text{m}

with a force of

300\,\text{N}

. The entire

40\,\text{m}

journey takes

16\,\text{s}

. What is the average power developed by the horse? a)

700\,\text{W}

1000\,\text{W}

875\,\text{W}

560\,\text{W}