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Physics 7 Online
OpenStudy (anonymous):

A 0.160 kg ball attached to a light cord is swung in a vertical circle of radius 70.0 cm. At the top of the swing, the speed of the ball is 3.26 m/s. The centre of the circle is 1.50 m above the floor. Calculate the speed of the ball when the cord is 30.0̊ below the horizontal.

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