The speed of an object does not require a direction to be considered, it simply has a value and unit, for example, 27 \(m\,s^{-1}\). Velocity is a vector quantity which requires a value, unit and ...

The gradient of a displacement-time graph at a particular time gives the velocity of the object at that time. The gradient of a velocity-time graph at a particular time gives the acceleration of the ...

The Annals of Applied Probability, Vol. 3, No. 1 (Feb., 1993), pp. 56-80 (25 pages) Consider first-passage percolation on Zd. A classical result says, roughly speaking, that the shortest travel time ...