Physics, 31.03.2020 04:02 zafyafimli

A 20 g ball is fired horizontally with speed v0 toward a 100 g ball hanging motionless from a 1.0-m-long string. The balls un-dergo a head-on, perfectly elastic collision, after which the 100 g ball swings out to a maximum angle umax=50. What was v0?

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A 20 g ball is fired horizontally with speed v0 toward a 100 g ball hanging motionless from a 1.0-m-...

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