Answer to Question #86955 in Mechanics | Relativity for Jonathan

Question

Define speed, velocity and acceleration

Answer 1

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is a physical vector quantity; both magnitude and direction are needed to define it.

Speed of an object is the magnitude of its velocity (the rate of change of its position); it is thus a scalar quantity.

Acceleration is the rate of change of velocity of an object with respect to time.

More info:

https://en.wikipedia.org/wiki/Velocity

https://en.wikipedia.org/wiki/Speed

https://en.wikipedia.org/wiki/Acceleration