If during circular motion, tangential velocity of a body becomes double then centripetal force becomes:
- A.Double
- B.One half
- C.Four times✓
- D.One fourth
Why C is correct
Centripetal force varies as v^2 (Fc = mv^2/r). Doubling the tangential speed multiplies Fc by 2^2 = 4, so the force becomes four times. Answers like 'double' or 'one half' ignore the square dependence on velocity.