What is the difference between momentum, velocity and speed?

Speed is the instantaneous change in distance traveled s (no matter how convoluted of path is taken) divided by the instantaneous change in time, t or ds/dt. Speed is scalar or a single value. Velocity is a vector. read more

The difference between speed and velocity is not always clear in English as both words are commonly used to indicate the same. Velocity is always linear, so distance at a given time indicated in m/sec. Speed is also used for a circular motion and then commonly expressed in rpm. Momentum is the result of combined rotary motion and a mass. read more

The average velocity of an object is the difference between final and the initial velocity (in separate three dimensions) divided by the total time. The velocity of an object is directly related to the kinetic energy of the object. read more

Velocity Velocity is a physical quantity of a body. The instantaneous velocity can be given as the instantaneous speed of the object with the direction the object is moving at that moment. read more