hi the power P of a car is proportional to the velocity V When P is 3000 watts V is 8metres per second What is a formula for P in terms of V and what is P when V is 5.2 metres per second?
$$\begin{array}{rll} P&\alpha&V\\ P&=&kV\\ 3000&=&k*8\\ k&=&3000/8\\ k&=&375\\ so\\ P&=&375*V\\\\ When\; V&=&5.2\\ P&=&375*5.2\\ P&=&1950\;\;watts\\ \end{array}$$
