Question

what is velocity? explain .

Answer 1

velocity is speed in a given direction. Speed describes only how fast an object is moving, whereas velocity gives both the speed and direction of the object's motion. To have a constant velocity, an object must have a constant speed and motion in a constant direction. Constant direction typically constrains the object to motion in a straight path. A car moving at a constant 20 kilometers per hour in a circular path does not have a constant velocity. The rate of change in velocity is acceleration. Velocity is a vector physical quantity; both magnitude and direction are required to define it. The scalar abolute value (magnitude) of velocity is speed, a quantity that is measured in metres per second (m/s or ms−1) when using the SI (metric) system.

For example, "5 metres per second" is a scalarand not a vector, whereas "5 metres per second east" is a vector. The average velocity v of an object moving through a displacement

during a time interval

is described by the formula:

Answer 2

displacement in unit time is called velocity.


displacement means shortest distance traveled .

for example u have travelled from place a to place b in shortest distance in respect to t time

SI unit of velocity is metre per second