CBSE Class 11-science Answered

please solutions

Asked by solankihemant2007 | 05 Mar, 2022, 05:19: PM

Expert Answer

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

Answered by Thiyagarajan K | 05 Mar, 2022, 07:48: PM

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