To a Ground-Based Observer, What Is the Speed of a Moving

question 21

Multiple Choice

To a ground-based observer, what is the speed of a moving ball tossed backward at 30 km/hour on a train moving forward at 90 km/hr?

• A) 150 km/hr
• B) 60 km/hr
• C) 30 km/hr
• D) 90 km/hr
• E) 2700 km/hr

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