A car travels at 25 m/s. A stationary obstacle is 70 m ahead when it is first detected. The braking distance is 50 m. A human driver has a reaction time of 1.0 s; an automatic system has a delay of 0.20 s. Which statement is correct?
The human-controlled car stops 5 m before it; the automatic car reaches the obstacle.
The human-controlled car reaches the obstacle; the automatic car stops 15 m before it.
The human-controlled car reaches the obstacle; the automatic car stops 20 m before it.
The human-controlled car stops 5 m before it; the automatic car stops 15 m before it.