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.
