Question

Two parallel rail tracks run north- south.Train A moves north with a speed of 54 km h-1 , and train B moves south with a speed of 90 km h-1. What is the

a) velocity of B with respect to A?

b) velocity of ground with respect to B?

Answer 1

Velocicity of BA = v of B - v of A
= 90-(-54)
= 90+54
=144km/h

b. velcoity of GB = v of G - v of B
= 0-90
=-90km/hr