How do you calculate the orbital velocity of mars?

Displacement/time* * * * *Velocity is a vector so the direction of displacement needs to be specified.

given distance- 200km time-5 hours speed- distance/time 200/5 40km/hr Divide distance by time for speed Divide speed by distance for time Multiply speed and time for distance Those are...

55,000 mph

11,000 mph or 24.1309 km/sec

I believe orbital velocity is about 73% of escape velocity at the same distance from the mass center of the body being orbited. Could be 71% because escape velocity divided by the square root of 2...