Kinematics Question 801

Question: A particle is moving in a circle of radius R with constant speed v, if radius is double then it’s centripetal force to keep the same speed should be[BCECE 2005]

Options:

A) Doubled

B) Halved

C) Quadrupled

D) Unchanged

Show Answer

Answer:

Correct Answer: B

Solution:

$ \ F=\frac{mv^{2}}{r} $ . For same mass and same speed if radius is doubled then force should be halved.



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