Recent content by awais1985

Homework Statement 1) You are responsible for selecting automobiles that will be used in your company’s fleet. The vehicle that you select has the following combined wind drag and rolling friction force during average operation conditions. The relationship for this force is Ff = (0.0214m +...

okay, so i am totally confused now. I thought power and energy the same thing basically with the exception that power gives the amount of energy per time. So, how can energy be negative if power reaches zero? I am sorry i am annoying you repeatedly.

that was b = 220000

Can i equate Energies? t=0; Energy = 8.1 × 108 J t=1; Energy = a0 – b/2 + c 8.1 × 108 J = a0 – b/2 + c 1.1 × 105 = b/2 b= 5500

Energy = a0t – bt2/2 + c Will this mean that c is 8.1 × 10^8? I still don't know how will i calculate b? This problem is frustrating!

Also, if i consider the ao term , how can i write 8.1 × 10^8 in its place? at t=1; Energy = 8.1 × 108 – b/2

Thanks man. Yes, i corrected that and i got Energy = a0t –bt^2/2 So here is the thing..when i put t=0 ...energy comes out to zero whereas we are given that energy at the start is 8.1 × 108 J. i am not understanding this.

I was working on the following problem: Determine the power output as a function of time from an energy storage device for a four hour discharge period when it is known that for this type of system the power is a linear function of time, (Power) = a0 - bt, where a0 = 1.1(105) W, b is a constant...