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- Homework Statement
- Three masses m, 2m and 3m are connected by two massless and rigid rods

of length l which are currently perpendicular to each other, as shown in the

ﬁgure. If the masses initially travel at velocity u towards a vertical wall and

mass m undergoes a collision with the wall, determine the impulse delivered

by the wall to mass m if the ﬁnal horizontal velocity of mass m is zero. There

is no friction between the wall and mass m. Assume that the tensions in the

rods are strictly longitudinal (because they are massless).

- Relevant Equations
- impulse = change in momentum

angular impulse = change in angular momentum

I have tried this same approach three times and I got the same answer. I can't figure out what's wrong. Btw answer is 12mu/(3+cos

^{2}α)

And yes, sorry for my shitty handwriting. If you can't understand the reasoning behind any step then please let me know.