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  4. An object is projected from ground with speed 20 m / s at angle 30° with horizontal. Its centripetal acceleration one second after the projection is [Take g=10 m / s 2 ]

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Q. An object is projected from ground with speed $20\, m / s$ at angle $30^{\circ}$ with horizontal. Its centripetal acceleration one second after the projection is [Take $g=10\, m / s ^{2}$ ]

Motion in a Plane

Solution:

Centripetal acceleration $=\frac{v^{2}}{r}=g-10\, m s^{2}$