please solutions

Kinetic energy , K = (1/2) m v²

where m is mass and v is velocity of particle

 

Hence velocity v is directly proportional to  √K

 

(1) At A particle is decelerating :-  This stament is false because At A slope is +ve , i.e. kineteic energy increasing .

Hence speec increasing and particle is under acceleration.

 

(2) AT B particle is accelerating :- This statement is false becuase at B kinetic energy is maximum and

subsequently kinetic energy keeps on decresing. Hence at B decelration starts and in subsequent motion is with

decreasing velocity. Particle is not accelerating.

 

(3) At C particle has maximum velocity :-  This statement is false because we see that particle has minimum kinetic energy

at C . Hence particle has minimum velocity

 

(4) At C particle has maximum acceleration :- This is true. if we compare the positive slope at A and D ,

we find that slope at D is greater than slope at A. Hence at D change of kinetic energy is maximum ,

hence change of velocity is maximum , hence particle has maximum acceleration