Question

two railway track are parallel to west east direction.along one track train A moves with a speed of 30ms from west to east while along the second track train B moves with a speed of 48ms from east west calculate
1. Relative speed of B with respect to A
2. Relative speed of ground with respect to B

Answer 1

Answer:

78 m/s east to west

48 m/s from west to east

Explanation:

two railway track are parallel to west east direction

train A moves with a speed of 30 m/s from west to east

train B moves with a speed of 48 m/s from east to west

Relative speed of B wrt A = B - A

30 m/s from west to east = - 30 m from east to west

= 48 - (-30) = 78 m/s east to west

Ground is stationary

so ground speed = 0 m/s

Relative speed of ground with respect to B = 0 - B

= - 48 m/s from east to west

= 48 m/s from west to east