A boy throws a ball at 10 ms/ to a friend at the back of a train,… A boy throws a ball at 10 ms/ to a friend at the back of a train, which is traveling at 10 m/s. What is the speed of the ball according to the friend? What is the speed of the ball according to an observer standing on the ground by the train?Suppose the boy now throws the ball at 10 m/s to the friend who is standing in front of the train. What is the speed of the ball according to the friend? And to the observer?SciencePhysics PHYSICS STEM
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