An athlete swings a ball, connected to the end of a chain, in a horizontal circle....

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An athlete swings a ball, connected to the end of a chain, in a horizontal circle. The athlete is able to rotate the ball at the rate of 8.62 rev/s when the length of the chain is 0.600 m. When he increases the length to 0.900 m, he is able to rotate the ball only 6.49 rev/s. (a) Which rate of rotation gives the greater speed for the ball? O 6.49 rev/s O 8.62 rev/s (b) What is the centripetal acceleration of the ball at 8.62 rev/s? x m/s² (c) What is the centripetal acceleration at 6.49 rev/s? x m/s² An athlete swings a ball, connected to the end of a chain, in a horizontal circle. The athlete is able to rotate the ball at the rate of 8.62 rev/s when the length of the chain is 0.600 m. When he increases the length to 0.900 m, he is able to rotate the ball only 6.49 rev/s. (a) Which rate of rotation gives the greater speed for the ball? O 6.49 rev/s O 8.62 rev/s (b) What is the centripetal acceleration of the ball at 8.62 rev/s? x m/s² (c) What is the centripetal acceleration at 6.49 rev/s? x m/s²