(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A car pf mass 900kg accelerates from rest to a speed of 20 ms^-1 whilst moving 80m along a horizontal road. Find the tractive force (i.e. the driving force) exerted by the engine, assuming that it is constant and that there is a constant resistance to motion of 250N.

2. Relevant equations

3. The attempt at a solution

m = 900kg, u=0ms^-1 , v=20ms^-1, s = 80m

acceleration = (20-0)/2 = 10ms^-2

force = ma = 900*10 = 9000N

workdone = 7.2*10^5J

What about the constant resistance to motion of 250?

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# Homework Help: Find the tracrive force

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