33Just returned frm school and in one look i said that.... Ok let me take pen and copy...
In the diagram below, The ball hits the billiards table and returns back in the same direction.
If the angle of hitting the wall is θ from the vertical. Find the minimum coefficient of friction between the wall and the ball.
Given coefficient of restitution is "e"
assume initial velocity if needed :)
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10 Answers
33
62lol.. yes priyam u are right :)
that was only to confuse u :P
good work
62lol.. yeah..
when i was giving this question.. i was thinking of ur statement about mu and tan theta :)
33Yeah they r always tanθ....But i know sumtimes it can betray any one...
actually here what i thought that only direction has to reversed then e will not affect as speed can change...
and for an extreme case when theta=pi/2 no mu can do that so then came the one and only tanθ capturing every real no and giving just the right hint for pi/2........
:)
1Great Abhishek;
I just returned frm school and saw the question.
I also calclated tan θ and then i read your answer and manishsh's comment. I was also a little confused.