A married couple is driving on a dark road at night at the rate of 98.0 m/s until they see a clown 50m in front of them and slam the brakes to slow the car down to 10.0m/s and still manage to hit the clown. How much time would the clown have had to move before being roadkill? Determine the average velocity of the married couples car.

Answer 1

V = Vo + a*t.
V = 10 m/s.
Vo = 98 m/s.
a = (V^2-Vo^2)/2d. It will be negative.
t = ?.