Question

Q.29. Assertion (A): A body moving on a circular path may or may not have acceleration. Reason (R): In uniform circular motion, the tangential acceleration dominates centripetal acceleration.
a) A is correct and R is correct;R is a correct explanation for A

b)A is correct and R is correct;R is not correct explanation for A

c)A is correct;R is incorrect

d)A is incorrect and R is also incorrect​

Answer 1

Answer:

Assertion (A): A body moving on a circular path may or may not have acceleration.

Reason (R): In a uniform circular motion, the tangential acceleration dominates centripetal acceleration.

b)A is correct and R is correct; R is not correct explanation for A

Explanation:

• Assertion is correct : In uniform circular motio,  body moves with constant spee . It is the magnitude of velocity which is constan .
• Reason is correct : In uniform circular motion, direction of acceleration (centripetal ) is always along the centre which keep changing when particle moves . As acceleration is a  vector quantity and its direction is changing so it can not be constant. ​ In a  uniform circular motion, the tangential acceleration dominates centripetal acceleration.