Question

2
9. A cyclist moving on a circular track of
radius 40 m completes half revolution in 40
s. His angular velocity is ...
A) 60° rad/s
B) 40° rad/s
C) 45° rad/s
D) 50° rad/s
​

Answer 1

Answer:

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)  

                                     

                               

= 2 m/s

Average velocity (v) = 2 m/s.

Explanation: