An athlete participates in a race now he is moving on a circular track of radius 80 m completes half a revolution in 20 s. Its average velocity is:

Question

An athlete participates in a race now he is moving on a circular track of radius 80 m completes half a revolution in 20 s. Its average velocity is: (A) 8 m/s (B) 16 m/s (C) 10 m/s (D) 12 m/s

Tardigrade Admin · Accepted Answer

Displacement =2 mathrmR mathrmTime=20 mathrmsec (Average velocity =(2 mathrmR/20)=(2 × 80/20)=8 mathrm~m / mathrms <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/e7c4a2d0e33e6948a6c363e2a45af7a3-.png" />

Q. An athlete participates in a race now he is moving on a circular track of radius $80 m$ completes half a revolution in $20 s .$ Its average velocity is:

$8 m / s$

$16 m / s$

$10 m / s$

$12 m / s$

Displacement $= 2 R$
$Time = 20 sec$
(Average velocity $= \frac{2 R}{20} = \frac{2 \times 80}{20} = 8 m / s$

Q. An athlete participates in a race now he is moving on a circular track of radius 80m completes half a revolution in 20s. Its average velocity is:

8m/s

16m/s

10m/s

12m/s