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

A supertanker of mass 1.0 X 10^8 travels 3.5km, reaching a speed of 4.1km/h from rest. What was the magnitude of the unbalanced force acting on it?

2. The attempt at a solution

I got the acceleration(2.4m/s^2), but how do I fit this into the equation? The answer is 18529.5N, but I have no idea how they got that.

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# Basic force question(should be too easy)

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