Question

A cyclist moving on a circular track of radius 40m completes half revolution in 40s.its average velocity is

Answer 1

Displacement of the cyclist in half revolution is, d = diameter of the circular track

i.e., d = 80 m

Time taken, t = 40 s

Average velocity, v = total displacement/total time

=> v = d/t = 80/40 = 2 m/s

Answer 2

Explanation:

The average velocity of the cyclist is 2 m/s.

To find:

The “average velocity of  cyclist” the given.

Solution:

Displacement of the cyclist in half revolution is (d) which is equal to “diameter of the circular track”.

i.e., d = 80 m

Time taken, t = 40 s

“Average velocity” is defined as the ratio of the total displacement and the total time.

Average velocity (v)  $=\frac{\text {Total displacement}}{\text {Total time}}$

$\Longrightarrow v=\frac{d}{t}$                                      

                                $=\frac{80}{40}$

= 2 m/s

Average velocity (v) = 2 m/s.