A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If the centripetal acceleration is 9.8m/s^2, its angular speed in rad/sec is 1. 22/72. 73. 144. 20
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r = 0.20 m. a = 9.8 m/s². ω = ?
centripetal acceleration = a = r ω²
9.8 = 0.20 * ω²
ω = 7 rad/sec.
Option (2)
centripetal acceleration = a = r ω²
9.8 = 0.20 * ω²
ω = 7 rad/sec.
Option (2)
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