When an observer is standing on earth, the trees and houses appear stationary to him .However , when he is sitting in a moving train, all these objects appear to move in backward direction. Why ?

When an observer is standing on earth, the trees and houses appear sta

1.	When an observer is standing on earth, the trees and houses appear stationary to him .However , when he is sitting in a moving train, all these objects appear to move in backward direction. Why ?
Answer» Solution :For the stationary observer, the relative velocity of TREES and houses is zero. for the observe sitting in the moving train, the relative velocity of houses and trees is NEGATIVE . So these OBJECTS appear to move in BACKWARD direction .