Chapter 10, Problem 56A

To determine

Power developed by engine.

Answer to Problem 56A

Power developed by engine is $90\text{kW}$ .

Explanation of Solution

Given:

Speed of boat is $v=15\text{m/s}$

Force exerted is $F=6\text{kN}$

Formula Used:

The power developed is given by,

  $P=\frac{W}{t}$ ….. (1)

Calculation:

As, $W=Fd$

So,

  $P=\frac{Fd}{t}=Fv\left(\because \frac{d}{t}=v\right)$

On putting the values

  $\begin{array}{l}P=6\times {10}^3\times 15\\ =90\text{kW}\end{array}$