Question

3.) uniform circular motion is an accelerated motion? why? 4. What is the net acceleration in a non-uniform circular motion? 10.)The average speed of a particle after completion of one revolution is zero but average velocity is not zero. Is this statemen correct or incorrect? Why?

Answer 1

3.In uniform circular motion even the speed will be same but the direction for the body changes throughoutly that's why the body possesses velocity and we know that the rate of change of velocity respect to time is know as uniform acceleration so the motion will be know as uniformly accelerated motion.

4.
In non-uniform circular motion, the magnitude of the angular velocity changes over time. The change in direction is accounted by radial acceleration (centripetal acceleration).



10.Incorrect. Average velocity is zero because initial and final points are same after completion of one revolution. where as average speed is not zero because it will cover certain distance in one revolution.

Answer 2

Uniform circular motion is an accelerated motion because the velocity keeps on changing equally in equal time.
The net acceleration of an object performing a non uniform circular motion if the resultant of the acceleration of due to change in the magnitude of velocity and acceleration caused due to the change in the direction of velocity.
The statement is wrong. speed is greater than velocity and speed cannot be negative.