Which of the following statement is not true? <br>
1. The velocity in uniform motion doe not depend upon the time interval <br>
2. External force is required for an object to be in uniform motion <br>
3. For a uniform motion along a straight line in a given direction, the magnitude of the displacement is not equal to the actual distance covered by the object. <br>
4. The average speed is equal to the arithmetic mean of individual speeds.
