Escape velocity

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3. First - escape means getting away from the earth.
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5. Velocity is a scientific word or term for speed in a named direction. 
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7. Which direction is the rocket going?  Up won't do.
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9. At 11km/s or 6.85 miles/s you can successfully break orbit and escape the gravitational pull of the Earth. 
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11. 11km/s = metres per second or 6.85 miles/s
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13. Calculate 6.85 miles/s into mph or miles per hour.
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15. You can use 7 mph to make it easier.
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17. At 10km/s or 6.21 miles/s the Earth will eventually slow down your ascent till you begin falling back towards the ground. 
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19. These values are at ground level. Once in orbit the escape velocity is lower than 11km/s.  source
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21. In other words, velocity is the rate of change of position of an object where position includes direction .....
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23.  source

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