Kinematics Question 343

Question: An athlete completes one round of a circular track of radius R in 40 sec. What will be his displacement at the end of 3 min. 20 sec?

Options:

A) $ Zero $

B) $ 2R $

C) $ 2\pi R $

D) $ 7\pi R $

Show Answer

Answer:

Correct Answer: A

Solution:

Total time of motion is 3 min 20 sec = 20 sec. As time period of circular motion is 40 sec so in 20 sec athlete will complete 5 revolution i.e., he will be at starting point i.e., displacement = zero.



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