If the radius of the circular path of a moving body is half without changing speed of rotation then the fc becomes
Correct answer: C. Doubled
- A. Half
- B. One third
- C. Doubled
- D. One fourth
Explanation
If the radius is halved, the centripetal force will be doubled. Remember the direct relationship between force and radius.Fc=mv2/rnew radius=r'=r/2Fc'=mv2/r'Fc'=mv2/r/2Fc'=2(mv2/r)Fc'=2Fc
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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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