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A bus is traveling north at a speed of 90 kilometers per hour(km/hr). A motorcycle traveling north at a speed of 120 km/hr passes the bus. Which describes what the bus's motion looks like to the driver of the motorcycle? A) the bus looks like it is moving south at 30 km/hr B) the bus looks like it is moving north at 90 km/hr C) the bus looks like it is moving north at 120 km/hr D) the bus looks like it is moving south at 210 km/hr
What is A, the bus looks like it is moving south at 30 km/hr?