Hi friends, I have an issue in solving a Collision of ball with inclined plane. Please Help me in solving this. Thank you all in advance. The problem is as: https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-frc3/q71/s720x720/1379765_1432382863655486_1628611844_n.jpg Attempt: https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-ash3/q77/s720x720/1381857_1432380430322396_543886441_n.jpg So friends when I place vale of tanθ, the answer arises e = 1 But according to question the answer of the problem is tan2θ, which is Option (A) . Please try to help me in this. I will appreciate the help.