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Answer:
The Correct option is 2.
Explanation:
Given Data -
Mass of the particle - 10 g = 0.01 kg.
Radius of circle which particle is moving - 6.4 cm.
Kinetic Energy -
So,
Now, as given -
Kinetic energy of a particle is equal to by the end of 2nd revolution after the begining of the motion of the particle.
It implies, Initial velocity (u) is 0 m/s at this moment.
Now,
Using Newton's 3rd law of motion,
Known values in Equation,
∴ Option 2 is Correct.