Question

If $F$ is the force required to keep a train moving at a constant speed $v,$ the power required is

• A. $\frac{1}{2}F{v}^2$
• B. $F{v}^2$
• C. $\frac{1}{2}Fv$
• D. $Fv$

Answer 1

The correct option is D $Fv$

$P=F\cdot V$

Hence,

option $\left(D\right)$ is correct answer.