You are driving your new sports car at a velocity of 90km/hr, when you suddenly see a dog step into the road 50m ahead. You hit the brakes hard to get maximum deceleration of 7.5m/s^2. How far will you go before stopping? Can you avoid hitting the dog? I got 540m, which I know is wrong. V=0; Vi=90; a= -7.5; d=? I plugged those values into this formula: V^2= Vi^2 + 2ad. What have I done wrong? Anyone?