[v1*t -(a/2)t^2] + [v2*t - (a/2)t^2] = x
(v1 +v2)*t - a t^2 = x
a is the acceleration rate.
The time t to collision depends upon the deceleration rate a as well as v1+v2 and x.
If there is no real solution to the quadratic, they do not collide.
Two trains are heading toward each other on the same track with velocities v1 and v2 respectively. The drivers,noticing this when the trains are at distance x apart, apply brakes, giving same acceleration y to each train. The necessary condition for collision is?
1 answer