Test Academy | A ball B1 of mass M moving northwards with velocity v collides elastically with another ball B2 of same mass but moving eastwards with the same velocity v. Which of the following statements will be true B1 comes to rest but B2 moves with velocity √2v, B1 moves with velocity √2v but B2 comes to rest, Both move with velocity v / √2 in north east direction, B1 moves eastwards and B2 moves north wards

Question

A ball B1 of mass M moving northwards with velocity v collides elastically with another ball B2 of same mass but moving eastwards with the same velocity v. Which of the following statements will be true

Options :

B1 comes to rest but B2 moves with velocity √2v
B1 moves with velocity √2v but B2 comes to rest
Both move with velocity v / √2 in north east direction
B1 moves eastwards and B2 moves north wards

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