If you find skid marks 180 meters long and assuming the deceleration was 10 minutes how fast was the car traveling before it hit the brakes?

Answer 1

To determine the initial speed of the car before it hit the brakes, we can use the formula for deceleration: ( v^2 = u^2 + 2as ), where ( v ) is the final velocity (0 m/s when the car stops), ( u ) is the initial velocity, ( a ) is the deceleration, and ( s ) is the distance (180 meters). Assuming a deceleration of 10 m/s² (not minutes), rearranging the formula gives ( u = \sqrt{v^2 - 2as} ). Plugging in the values, we find ( u = \sqrt{0 - 2(-10)(180)} = \sqrt{3600} = 60 ) m/s, which is approximately 216 km/h.