343m/s x 1km/1000m x 3600s/h = 1234.8km/h
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It is a measure of acceleration. Every hour, the speed increases by 343 metres per second.
15.6464 meters per second
4.5 meters in 9 second how fast in kilometer per hour?
27 mph = 12.07008 meters per second.
119 meters per second is about 266.2 mph.