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Let's consider the effect of drag on the ball at the end of a string that I swung above my head as a lecture demonstration. The ball is 7 cm in diameter and has a mass of 8 g. The length of the string is 0.5 m and the tangential velocity of the ball is 5 m/s. We can consider the ball to be a smooth sphere. What is the tangential acceleration on the ball due to drag? What is the magnitude and direction of the net acceleration on the ball.

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