You are standing at a platform, with a ball. a train approaches and u throw the ball at it in a straight line from a small distance. in what direction des the ball reflect off? heres what i think, tell me where i am wrong.
a) the direction opposite to motion of the train: relative to the train, the ball is already moving in the opposite direction, so it must reflect off in the direction of the balls original motion ie. opposite to train.
b) same direction as the train: the momentum of the train is transfered to the ball and it moves in the same direction. (prolly wrong xD)
c) returns back straight: there is no horizontal component in the ball's motion so it just returns, like a ray of light when it is reflected off a moving mirror.
edits:: The ball is spherical, thrown at the side of the train.
Wouldnt the ball and train act like a system of gears and hence the rotation in the ball may be in the opposite direction?
include all friction and gravity