Question

a particle rotating in a circle may have constant speed but its velocity changes continuesly. give reasons​

Answer 1

Explanation:

because there is continuously change of direction .........so displacement is zero

Answer 2

Answer:

because velocity is a vector quantity .

Explanation:

we know that velocity is a vector quantity , a vector quantity have its magnitude and direction both . in circular motion magnitude of velocity which is called speed remains constant , but its direction changes continuously , so if direction of a vector changes the vector also changes .

that's why velocity of a particle in circular motion changes continuously while speed of particle remains constant .