Physics

Problem

Read the following steps intended to prove the relation

P = F v

for a body moving under a constant force: Step I:

P = \dfrac{W}{t}

Step II:

W = F + s

Step III:

P = \dfrac{F + s}{t}

Step IV:

P = F\left(\dfrac{s}{t}\right) = F v

Which step contains the error? a) Step I b) Step IV c) Step II d) Step III