Question

The driver of a passenger train moving at a speed 25ms^-1 observer a goods train at rest on the Same track at distance 250m and immediately applies the brakes. What should be the minimum retardation of the passenger train so as to avoid collision of the two trains

Answer 1

initial velocity= 25ms^-1.

final velocity=0ms^-1.

time =distance/speed

=250/25

=10 seconds.

retardation =(u-v)/t

=25/10

=2.5ms^-2.(ANSWER)