A car with a mass of 1.50 X 10^3 kg starts from rest and accelerates to a speed of 18.0 m/s in 12.0 s. Assume that the force of resistance remains constant at 400.0 N during this time.what is the average power developed by the car's engine?

Question

Lionblaze15 · Answer

Okay you have to do an equation to figure this one out. So you know F=Force and R=resistance  so you're dividing the time witch is 12.0 m/s (miles per second) by the resistance  of 400.0 N (Newtons). That's what I think you do.

Lionblaze15 · Answer

Call in the experts @Shadow @Ultrilliam

justjm · Answer

Yeah @Lionblaze15 is getting you there..
Recall that P=Fv
You aren't given Force here, but you are given mass and the ingredients for average rate of change for speed, which you could just consider as acceleration. Recall that F=ma. Now you can find force. You are also given resistance, so you would subtract 400.0 N from the Force you get, to find $F_\text{net}$. Once you find $F_\text{net}$, plug it into P=Fv, and you will find power.