While on a bike heading east at 5.0 m/s a kid throws a ball due east at...

...13.0 m/s toward a stationary friend. A? While on a bike heading east at 5.0 m/s a kid throws a ball due east at 13.0 m/s toward a stationary friend. At what speed does the ball approach her friend? Now suppose the friend is running west at 4.0 m/s; at what speed is the ball approaching her? If at the instant the ball is launched the two kids are 6.0 m apart, how long would the ball be in flight before it's caught?

18 m/s
22 m/s
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