A29.0 g ball is fired horizontally with initial speed v0 toward a 100 g ball that is hanging motionless from a 1.0 m long string. the balls undergo a head-on, perfectly elastic collision, after which the 100 g ball swings out to a maximum angle θmax=50∘, what was v0?

Explanation:

As we know that the ball swings out to maximum angle of 50 degree

so we will have use energy conservation to find the initial speed of the ball

so we have

now we can use momentum conservation for this collision

also we know that it is elastic collision

so we will have

now from above two equations we have

0.863333

86%

hope this

c

explanation: