WebA car traveling along the highway brakes to a stop over a certain distance. More braking force is required if the car has A corresponding change in momentum It is correct to say … Webmore. you only have to change the signs because all though the speeds are the same the cars are now moving AWAY from the intersection, so dy/dt = 60, not -60, and dx/dt = 30, not -30. This means that instead of 1.2 * -30 + 1.6 * -60 = 2 ds/dt, it would be 1.2 * 30 + 1.6 * 60 = 2 ds/dt. Therefore if you simplify you get a ds/dt of 66 miles/hour ...
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Brakes GIFs - Find & Share on GIPHY
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