Answer:
Train must move with equal speed as of platform in opposite direction i order to maintain zero relative velocity.
Explanation:
From the question it is given that
relative velocity between platform and train = 0
since relative velocity of train with respect to platform is given by
[tex]v_r_e_l = v_t - v_p[/tex] where, [tex]v_t[/tex] is the velocity of train and [tex]v_p[/tex] is the velocity of platform
[tex]0 = v_t - v_p[/tex]
⇒ [tex]v_t = v_p[/tex]
since platform is always at stationary i.e., [tex]v_p = 0[/tex]
thus train velocity [tex]v_t[/tex] = 0
Therefore, train does not move
If, Platform is moving then train must move with equal speed as of platform in opposite direction
