12345 km an hour
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Relative speed is the speed between two moving objects with no regards to a fixed reference. Speed is how fast something is moving with respect to an object.
The object is moving at the speed of 50 ms-1 .
The answer depends on how fast it is moving - in some units! Unless it is stopped in which case its speed is 0 km per hour!
How fast molecules are moving. If they are moving fast its hot, but if they are moving slow it is cold
It's about 40.18 miles per hour if you are maintaining a steady speed.