A body is rotating in circle of radius r, keeping period of rotation constant but radius is doubled(2r)then centripetal force become:
Correct answer: C. Double
- A. Half
- B. Same
- C. Double
- D. Four times
Explanation
Therefore, the correct answer is option C: Double. The centripetal force becomes double when the radius is doubled while keeping the period of rotation constant as : Fc=mrw2 Fc=m(2r)w2 Fc=2mrw2 So option C is correct
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About Angular and Linear Quantities
Rotational motion relates angular displacement, angular velocity and angular acceleration to linear displacement, tangential velocity and tangential acceleration through the radius. Questions use radians, v equals r omega and tangential acceleration, while distinguishing tangential velocity from centripetal acceleration and angular quantities from their linear counterparts.
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