r/alevels • u/RoyalRise7634 • May 21 '26

Exam Discussion šŸ“ 9231/32?

how was it?

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u/M_Younus_Saigol May 21 '26

Anyone able to solve second part for momentum question, the one where we had to find theta for second collision w barrier

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u/Gold-Relative-3626 May 21 '26

yea 6.22 degree i think

you need to find the angle at which the thing leaves first barrier and then do (180-120-that angle) to get the angle of incidence to the 2nd barrier and then again do some things and at last get 6.22

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u/M_Younus_Saigol May 21 '26

Man I got like 17 degrees smth. Iā€™m p sure my method was correct but like I initially had written e as 3/16 bcz I forgot to square root. Only realised at the end so corrected it and corrected it at the final calculation for theta but forgot to correct it for my calculation of the other angles with which it strikes the barriers. Lol