(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 15 g ball is fired horizontally with speed v0 toward a 117 g ball hanging motionless from a 1.53-m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 117 g ball swings out to a maximum angle θmax=53°. What was v0?

2. Relevant equations

h=L(L-cos(theta)

V=Square root of (m*g*h/(.5*M) little m is ball moving and M is the ball not moving

(v2x)f=2m1/m1+m2 (V1x)i

3. The attempt at a solution

Im not sure if im using the right equations and whether the angle given is the one we use in the equation, or if we have to subtract it from 90 first

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# Homework Help: Perfectly elastic collision

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