An 800 kg police boat slows down uniformly from 50 km/h [E] to 20 km/h [E] as it enters a harbor. If the boat slows down over a 30 m distance, what is the force of friction on the boat? (Hint: You will need to convert the velocities into m/s.)
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Comments
Yes, the distance is 30 m. When we consider the acceleration we need multiply it by 2 (see formula).
isnt the distance 30m ?