Question

How to you measure instaneous speed?

Answer 1

Answer:

Speed

Speed is the rate of change of position with time.  Speed is a scalar quantity, meaning that it has a magnitude (a value), but no direction. For that reason, speed can never be negative. The unit for speed is meters per second (m/s).

Instantaneous speed

When the speed of an object is constantly changing, the instantaneous speed is the speed of an object at a particular moment (instant) in time.