Question

Two railway tracks are parallel to west-east direction. Along one track, train
A moves with a speed of 54 kmph from west to east while along the second
track train B moves with a speed of 90 kmph from east to west. The (i) rela-
tive velocity of Bw.rt A and ii) relative velocity of ground w.rt. B are​

Answer 1

Answer:

Explanation:

(i)  Relative velocity of B w.r.t  A= Sum of speeds of trains

                                                   =54+90

                                                   =144kmph

(ii)Relative velocity of B w.r.t Ground(G)=vB/G=−90kmph

                                                                          vG=0

     Relative velocity of ground(G) w.r.t B =vG/B=vG−vB/G

                                                                       vG/B=0−(−90)

                                                                       vG/B=90kmph