eli5 if a pitcher stands on top of a train going 50mph and throws a pitch that goes 100mph. does the ball move at 150mph?

Question

eli5 if a pitcher stands on top of a train going 50mph and throws a pitch that goes 100mph. does the ball move at 150mph?

In: 1

Answer 1

Before air resistance and relative to the ground, yes. Relative to the train it’s going 100mph. The speed of anything is only ever measurable in comparison to something else.