A stone is moved round a horizontal circle with a 20 cm long string tied to If centripetal acceleration is 9.8 m/s2, then its angular velocity will be :7 rad/s22/7 rad/s49 rad/s14 rad/sSolution:Centripetal Acceleration is given by a= ω²R ⇒ 9.8 = ω²× 1/5 ⇒ ω² =49 ⇒ ω = 7 rad/sec
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