Question

Joe wakes up to find himself tied to the train tracks. He sees a train 450 meters away, moving towards him at a speed of 42 m/s. At that moment, the train operator sees Joe and engages the brakes, causing it to decelerate at a rate of 1.4 m/s^2. Joe knows the train will not stop before it reaches him. How much time does Joe have to free himself and escape a grisly death?

Answer 1