A bus is moving at 5.0 m/s when a passenger walks forward at 1.5 m/s relative to the bus. How fast is this passenger moving as seen and measured by (a) a person waiting at the bus stop and (b) the driver of the bus?
(a)
"5.0+1.5=6.5\\:\\rm m\/s"(b)
"1.5\\:\\rm m\/s"
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