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1. The problem statement, all variables and given/known data

a tank of 80 metric tonnes is travelling at a uniform speed of 54km/r on level terrain, it the starts travelling uphill on an incline of 1 in 10 sine slope)

Calculate the extra power required from the engine in Megawatts to maintain the same speed on the incline.

2. Relevant equations

F=M*A

P=F*V

F=(% grade of hill)*M*G

3. The attempt at a solution

I calculated the power required to go uphill as

F=1/10 * 80000*9.8 = 78400N

therefore power = F*V = 78400*15m/s = 1.176MW

the problem I have is that I cant seam to find an equation to work out the force on the flat which does not have the acceleration variable, do I just put this to 1 and solve that way? which would give a force of 784000N, P=F*V = 784000*15 = 11760000.

take the first answer away from the second which leave a difference in power of 10.584MW.

Really not too sure.

I know of other equations such as Ek=1/2Mv^2 for power to accelerate a vehicle but dont think this is the equation to use,

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# Homework Help: Another question that is troubling me

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