Question

Only for Physics lovers.

Answer 1

velocity of bike wrt train= 100 - 100 = 0 m/s

velocity of bike wrt Earth= 100 + 100= 200 m/s

Answer 2

Answer:

velocity of bike V1= V2 = 100 m/s

velocity of bike w.r.to train = V2 - V1

= 100- 100 = 0

and,

velocity of bike w.r.to earth is that

in earth frame , ground is at rest so

= 100-0

= 100.