In the 1700's free African Americans had no legal rights. The Glorious Revolution of 1688 helped convince the American Colonies that they had the right to overthrow an unjust government.
Displacement is the word we use for the distance covered so in this case when a car travels 20 meter east in 1 second, at the end of that 1 second interval a car travels a distance of 20 meter.
And the distance covered is the displacement, so it means that displacement of the car after 1 second is 20 meter east.
