# physics

a car travel with a uni form velocity of 25m/s for 5& the brak over then applied and the car coms the rest wirh a uniform retar in fyrther 10s draw ut grph and use it to find 1 distance covered 2 the reatardation

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1. if the velocity changes from 25m/s to 0 in 5 seconds, that's an acceleration of -5m/s^2.

So, the distance covered till the full stop is

25*5 + 25t + 1/2 (-5)t^2
with t=5, that's

25*5 + 25*5 - 125/2 = 187.5 m

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posted by Steve

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