In abave questions ` 13 and 14`, we have carefully distinguished between average speed and magnitude of average velocity. No such distainction is necessary when we considedr speed and magnitude of velocity. The instantneoud speed if alwary equal to the magnitude of nistantaneous velocity. Why ?

Explanation

For instantaneous speed we consider only a small interval of time. During this short interval of time, direction of motion is not supposed to change. Therefore, there is no difference between total distance covered and magnitude of displacement. Hence, instantaneous speed and instantaneous velocity are same.