A 270 g ball at the end of a string is revolvinguniformly, Ask an Expert

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A 270 g ball at the end of a string is revolvinguniformly in a horizontal circle of radius 0.51 m. The ball makes1.7 revolutions in one second. What is the speed of the ball as itgoes around in the circle?

What is the centripetal acceleration?

What is the force needed to keep the ball moving inthe circle?

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